No, the admittance that they abandoned their duty implies the abandonment of duty. (Cassandra: We did nothing because we just assumed Meredith had things on lock)
Then after the war the entire Templar order is almost destroyed because thanks to them.
They didn't abandon their duty. They investigated the situation and wrongfully believed Meredith had things well in hand.
And Lucius is a traitor.
I don't know of any implications regarding that. I don't care that much about it anyway because I don't think it's even necessary to have every member go through with the vigil.
The first mage who tried it, failed. It may have been an isolated case but since Pharamond didn't gain any abilities, it seems to be the norm.
Then there is no real reason to have mages in the Seekers when they can just work with it without being members.
Would you trust a Seeker? After the formation of the Templars and the Chantry, the only member of the organization to even know of the application was the Lord Seeker themselves.
As a consequence of this secrecy, the revelation totally mind-fluxed Lucius, and to say that he became a liability is beyond an understatement. It also probably had the same affect on others before him, given that the Order of the Fiery Promise has surfaced and resurfaced multiple times throughout history.
More than I would trust a mage, yes. I can't imagine even Wynne would not react drastically over it.
As you say, the Order has resurfaced many times without being a real threat. It was just extremely bad luck someone like Lucius became Lord Seeker precisely when Corypheus was enacting his plans.
Yeah, I figured you would use him.
Do we know if he was Harrowed? It could be a Jowan situation.
She used it if you send Grace and her fellow mages to the Circle.
I know she kills a few if you have them surrender in Act 1.
Are they made Tranquil if captured in Act 2?