There's a stronger argument that the Qunari high command had decided that she had gone off the reservation. That letter was not delivered to Josephine. Instead it was crumpled up into a ball on the desk of the subject. This is not consistent with the Qunari just going for the plausible deniability. If that was all they were doing, then there would be no reason for it to be redirected. Indeed that would defeat the purpose. The correspondence was redirected to the subject and the subject doesn't seem to be happy with what she read. Based on that, I'm confident that the Guy Fawkes scheme was in fact unauthorized just as the letter says. Doesn't mean anything else was, of course.
The letter was to Josephine. It did not get delivered to her because it was intercepted. That is more proof that Viddasala was acting outside the Qun. She deliberately intercepted a letter from Par Vollen to their ally and tried to destroy the letter. That's even with the stakes being all out war, which the Qunari did not want with the south.
Correct. If this were plausible deniability it would have been delivered to Josephine in order to deceive her into thinking there was no Qunari threat, and thus no reason for talk of war.
Unless he knew it was just plausible deniability. He, and the Qun are actively spying on you. We get this from Solas, who's own spies tripped over their spies. So you don't think it likely that IB knows full well what's going on, and that if the operation goes ****** up, which it did, that they were going to deny any knowledge? I find that to be the most likely explanation, if IB isn't Tal Vashoth.
And how would he know that? And what about it being intercepted by Viddasala? That indicates that it was not plausible deniability. The only way Hissrad could possible know that it was ruse was if he was in on it from the beginning. But if he had been in on it from the beginning then he would have thwarted the Inquisitor early on. He would not have waited until after the Inquisitor thwarted Dragon's Breath. Also, Hissrad would have disregarded Viddasala's order at that point since she already failed, and the Qunari would then rely on Hissrad being embedded in the Inquisition from that point on. He would not give up his well placed position just to jump on Viddasala's burning dreadnaught.
Yes. You're right. You are the only person who reads the codex entries and listens to the characters. My copies of WoT are just for show. In fact, I don't even play Dragon Age!
What does WoT have to do with this? You bought some products. That doesn't make you knowledgeable of the in-game codices.
Because, had her plan worked, it wouldn't have been necessary. She was planning to blow up the Exalted Council, the Inquisitor was there. Dangerous magical Anchor has now been taken care of.
If she'd activated Hissrad, it would have drawn unnecessary attention to the other Qunari agents in the Inquisition, possibly scuttling the Dragon's Breath plan completely.
As for why she thought the Inquisition was working with Solas: probably because they were working with him until recently. "No, we totally lost track of Solas" probably sounds a lot like "nah, they're a rogue agent, they're not following the Qun." 
But I'm asking, why didn't she activate Hissrad sooner in order to ensure her plan had worked? As it stood, Hissrad could actually help destroy her plan.
The Inquisition wasn't aware of any other spies in the Inquisition. And if Hissrad had attacked the Inquisitor while in any of the distant lands, no one would have known about it except him.
Ah ha, but they weren't working with him recently, and Hissrad knew this for a fact. So if this had been an official operation, she would have known what Hissrad knew. She didn't though.
Yeah, I remember all the notes and codexes stating that.
Great. In that case you can point one out to me.
No it's not. Him sleeping with random people is not part of his job. He is a spy, he does not need to sleep with anyone unless he does it to spy. Him sleeping with a random bar maid is not him spying. And don't say it's to fit it ether because he doesn't need to do that to fit in.
And for the last time get that the ben hassarth is free to do everything to do their and get to the end they need to get, that includes feeding lyrium to sarrabas.
First off, how do you know these are random people? Second, you admit it is part of his job to sleep around. So even random people can be sources of info. Bar maids hear and see plenty of things.
Not according Hissrad. He did not believe Jerrik at first because the idea sounded so absurd to him. He said Viddasala would NEVER let saarebas within a thousand feet of lyrium. Her purpose is to stop magic, not encourage it.
Yes they are. Stop being so stubborn. The very game tells you this.
Proof? The video you showed was of a non-alliance worldstate. And the Qunari stated that Viddasala was rogue and the forces they were sending south were to stop her. With her dead, they had no reason to go south. This directly contradicts what Viddasala said about how the Qunari would now take the way of blades. They didn't, because she was lying.
Why would the Qunari attack the south at all when they are still at war with Tevinter? That makes no tactical sense.
Why? None of what they did to the saarabas effected them negatively. All it show is that the saarabas have far more self control then they thought they did with magic and did not need to be collared.
Since when are the Qunari result oriented? It doesn't matter if there are negative effects or not, the RULE is to not let saarebas anywhere near lyrium. The Qun demands that saarebas' magic be suppressed, and only let loose on enemies. Viddasala had an insane plan to enhance saarebas' magic in hopes he would figure out how to create the Veil as Solas is alleged to have done. Viddasala even had to write a letter convincing her followers that what she was doing was the right path.
They don't need to be collared? You sound like a Tal-Vashoth.
No they were. Why do you think Tevinter was caught off guard by a massive invasion force right after the Qunari disavowed the Vidissalla? Armies don't just appear out of nowhere, it takes significant logistics and prep time to get a proper invasion going.
Meaning the Qunari already had a massive invasion force ready for action in anticipation of something. Isn't odd that it just happened to be suddenly redirected to Tevinter right after the Vidissala failed and her actions were disavowed?
If you really believe that army wasn't meant for the South, I've got a bridge to sell you in Brooklyn 
The epilogue clearly states that Tevinter was caught off guard because of their own infighting. I understand how you could have missed it, since it flashes by so fast. It says nothing of a massive invasion force.
You know what, let's put this to bed right now.
Viddasala explicitly calls out orders to members of the Antaam: You will not leave here alive, Inquisitor! Antaam, ebrashok adim!
https://youtu.be/73jpYby0mz0?t=11m49s
She had members of the antaam with her to fight the elven spirits and contain the dragon. I already answered that.