Judging from a ending cut scene I saw, levels 13-20 could be done easily.
We would not have our tadpole powers if they made an 'official' ending. Then we would all go to Avernus to rescue Karlach and Wyll to permanently solve her heart problem. There would be enough content in Avernus to make our characters feel weak.
+1
That'd be a good side plot for BG4 for sure but it'd be a left turn for BG3, the whole game, defeat absolute, must defeat absolute, act 4, ok that's done new adventure ?
also new adventure based wholly around two characters the game doesn't let you have if you choose the wrong side of the act 1 big 'your choices matter' choice?
