Really classy, nice, but this staff design is very common. 
Good design, even if it isn't Tilani's style. It's very Orochimaru-ish.
By that logic, are lesbians using a strap-on somehow having heterosexual sex? I had no idea dildos could magically alter the gender of people who used them!
Like I wrote in a previous reply to someone else, it's a different case with different dynamics. However, for the female being penetrated there is a certain element of heterosexuality to that action, yes. Though I would not call such a female heterosexual.
I'm not really an open-minded person, nor a left-winger for that matter, but seriously, some of the things you're saying in this post are borderline 'phobic.
Impossible. Nothing I post is irrational. Therefore I can never be phobic. If you have issue with anything I post, quote and reply to it and I will be happy to discuss it. I believe it only seems phobic to you because you are used to observing only one side of the debate.
Now then, separate issue:
I have come to the conclusion that Magister Tilani should be an NPC that appears only during specific segments of the game, similar to Celene or Gaspard. The main reason is because the character's backstory and portrayal is too large of an undertaking for BioWare at this time. Remember that Tevinter is the next location, and BioWare will need to focus resources on making that country mysterious and stunning. That means designing actual buildings, structures, and man-made landscapes. The cities will need to be huge, and infused with magic. The interior designs will need to be wondrous. The items and objects will need to fit the theme.
The storyline will need to focus on the Tevinter culture. Its triumphs, its shortcomings, its challenges. Some of these can be show to us by Tilani, but delving into that character will distract from them.
Tevinter will not be the only place we visit though. We will likely see Weisshaupt as well as the Anderfels. Maybe Serault. Hopefully Kal-Sharok. Perhaps even Seheron. There should also be some ancient elvhen ruins in the mix, as well as places in the Crossroads and the Fade.
BioWare needs to focus on these things. I say put Dorian in the part as a mandatory companion to be the link between the player and Tevinter, as well as the (ex)Inquisitor. Then give us companions that are relevant to the various storylines.
Dorian is already connected to relevant characters. The (ex)Inquisitor, Calpernia, Alexius (possibly), Tilani, the Qunari through combat with them, and even some old faces like the Iron Bull (if alive) and in various ways depending on storyline, as well as Sera, Cole, and Thom Rainier. If we go to Weisshaupt, Blackwall will likely be there, and having Dorian there could provide extra options if both he and Thom were recruited. Oh... and Solas if he's in the next game, and he likely will be.
Who is Tilani connected to? Alistair? Varric? Two people we don't care to see AGAIN in DA4. And even if we want to see Varric, Dorian has a better connection to him after DA:I.
So I think BioWare should leave the issue alone and just focus on making high quality levels and storyline. Let Tilani be a higher-up NPC that helps move the plot.