Adding my voice here.

I am happy with Karlach's added 'going to Avernus' ending. I loved the character - as the best friend, not as romance interest - and this ending is completely fine for me.

But Astarion... it is just.... NO. I do not need any riding unicorns onto the rainbow with him, but....

The current ending is perfect for players who did not care about him and his arc. I was one of them in my 1st playthrough.

But in my 2nd playthrough I romanced him and comparing his end to his whole story, it is like a bad joke. I have no problem with him staying as a vampire spawn, but that dock scene with companions mocking him... absolutely awful tasteless joke.