I agree with all of this. The first two act develop the characters like a novel, and Astarion's is deep and involving. I found it was more enveloping than even the main story line at times. The ending for him - and act 3 altogether from a character standpoint - is just insulting and lacks anything at It's like watching the Lord of the Rings trilogy and condensing the last movie into 10 minutes of depth. The running from the sun scene is just.....bad. Please, do something.
