These 7000 spawns are quite unbelievable to me, especially because I don’t get to see them. Where are they? Certainly not in these two cells I find. And how did Cazador feed them all for all these years? It’s a miracle Baldur’s gate is still populated.

I really would have liked a cure for vampirism, not only for Astarion but also as a solution for the spawns. Freeing them seems like an absolute crazy idea, yet it is apparently the “good ending”. I tried all other option: killing them or leaving them imprisoned in their cells. None of them felt right. I really wanted a middle option. If not a cure, then a way to imprison them in the mansion and put them under supervision. They could be set free after receiving some training on how to control their urges.
Ok, maybe the mansion is too small for 7000 spawns. However, if they fit into the "cellar", there should be room somewhere I think.

I also would have liked to discuss the 3 vampire lessons with Astarion, that you can discover with wisdom checks when clicking on the skull of Cazador’s old master. It shows that Cazador was once a victim too, how the cycle tends to repeat itself and how it always leads to misery.
It could eventually be used on an ascended Astarion to make him see things differently? I didn’t ascend him. Is there an option to discuss it then?