Well, for me that's not working at all.

I do not make things up (I guess I lack the imagination for it) so for me the game ends when the credits start rolling. And if there is no clear defined way for it to continue after the credits (like there is a known vampire cure in Waterdeep or some such) then that's the end of the road for me. And in my particular case it's a piss poor ending for a spawn Astarion.

Who thought it was great idea to begin with to make a victim of abuse a target for cheap jokes, after all that the poor dude went through to redeem himself?

And as a whole his spawn ending feels unsatisfying and unfinished..