I've read that the mortal Tav ending with AA is somewhat lacking but haven't seen mentions of all the details related to it. Now that there is an actual video about it, I will put it here as a source of reference because this outcome needs improvements as well.



Tav who asked to be turned into a vampire but then changed their mind during the conversation with Astarion should either still be mortal and Astarion could potentially be a bit annoyed about it or they should be a vampire already like they are now, but there needs to be a mention (by the narrator in the opening of the scene would make most sense) what exactly happened there and why Tav changed their mind.
If Tav never asked to be a vampire and they actually aren't one in that scene then Astarion's dialogue needs to be different.

Also, I'm pleased that it was officially confirmed in an interview that AA is still the original Astarion and that the ritual doesn't magically change who he fundamentally is as a person (other than alters his body and gives him new abilities), and that he simply embraces his darker personality traits once he feels powerful.