It is at the beginning of the story and he overall seems to be more ok with doing nice things than being put on display (like at the party) or big talk. Him generally being in favour of Aylin's revenge in dialogue is otherwise also at odds with the disapproval you get for supporting her against Lorroakan and there are a few more places when it's the talk that seems to bother him, not the action. I assume he approves of everyone getting murdered? I mean he isn't to bothered by Shadowheart getting handed over to Viconia either if I gathered that correctly.
Nice things? He approved of every selfish choice I made. If he doesn't like being put on display then why is he suddenly ok being a hero that inspires hope a few months later? That's very much putting himself on display. When he's not ascended and runs away from the sun he's ashamed to join the team later. He does a 180 without a proper explanation. A more believable outcome would have been him admitting he's working as a mercenary. I didn't get any disapproval when meeting Lorroakan and saying I came there to watch what would happen and then supporting Aylin when things started getting heated. When you betray Shadowheart he actually sounds rather concerned (I guess about his own safety) and admits he's nervous. The quaintest reaction can be seen from Gale who disapproves but then sounds pretty cool with the decision and sees benefits in it.
Originally Posted by Anska
As for the lack of unicorns, I recently watched a video of Gale's proposal to a Mind Flayer Tav and I think that would make overall much more sense for Spawn Astarion as well - with some slight adjustments. The acknowledgement of sacrifice, the need for an openminded priest and the catering being difficult make all much more sense for Astarion than the normal dialogue.
No. Just... no. Astarion has standards, is a lookist and would not want to be with a soulless slimy freak. Throughout the game he's the most vocal about finding mind flayers disgusting. When Tav transforms he sounds like he's about to puke. He breaks up with Tav as AA does, he's just being much nicer about it. He's the only character who recognises Tav for who they are - no longer the Tav he knew and a monster.