Well, when you make the decision, you don't know that Mythal is still living. So that's a brand new conversation when you get back from the Fade. Is your Inquisitor going to regret it even more than Cullen will, aside from anything Bioware might do in a DLC?
Is your Kieran an OGB?
I don't know how my Inquisitor feels about it, to be honest. On one hand, it's.... interesting, the concept of having all this knowledge and trying to decide what to do with it. There was a good conversation with Solas about it where they finally agreed on something - that this knowledge should be used carefully and sparsely, and for the right reasons. On the other hand, she's not too big on magic as you know, so the whole voices in her head and being manipulated by ancient entities is really weirding her out. The conversation with Sera after the temple (about how the Maker and the elfy stuff don't fit together) went pretty much, yeah I don't believe any of that stuff, which is more or less how I imagine her first conversations with Cullen about it going - but now I'm going through the Flemeth scene and she literally pupetteered my IQ around, so that's a harsh blow to Ari's hubris. So much to process!
And yeah Kieran is OGB in this pt, Loghain was my designated Warden in the Abyss quest as usual, but later I got a letter from my Warden, so apparently she's still alive? I'm thinking I messed something up while poking around at the Keep, some tile that wasn't locked reverted to the OGB existing and I didn't notice before I imported. Sigh this was going to be my completionist canon run but guess not, lol. Well, it's interesting to see the extra content Kieran gets, but I'm really curious how the original scene without him plays out if you drank from the well yourself. I shall poke through my saves to try that one out.