"I hope they'll add an option when you exiled Anders from your side. I think its important."
As someone who kicked Anders out of the group as well, I'd largely agree with you, however I would note that intentional companion dismissal is notably absent from anywhere in the Keep, which is more problematic than simply omitting some of the most interesting choices that exist to make in the game, as it currently forces you to lie on one or more current questions in the Keep (such as "The Fate of Leliana").
So I'm on board, but I don't think that's the first problem to be addressed from the lack of companion dismissal options.
I don't really find the lack of companion dismissal options a priority issue, except maybe in Leliana and Anders' cases. The DAO companions are the only ones you can kick out of the party (through dialogue), and not only are most of them completely irrelevant to DAI but "alive & well" is a perfectly correct way of describing their situation. And of those who are relevant to DAI (Leliana, Morrigan, maybe Alistair), only Leliana's case is problematic, because her tile description is actually wrong (saying she remained with the Warden until the end of the Blight). Alistair can only be dismissed at the Landsmeet, which is covered, and Morrigan's opinion of the Warden would be mostly tied to the OGB & Eluvian choices.
For Anders, "alive & well" + "disapproved of Anders' actions" mostly covers it, but I'd be inclined to add it because it's part of the main decision in DA2 and because it also has implications for Sebastian.