Teens should also be adoptable.

I like the idea put like others have stated they should then have some skills, character values etc. So they feel like a new person introduced to the family for them to get to know and not a blank canvas.

I would also like the option to adopt werewolf, alien, vampires etc babies and up. For me it wouldn't matter if you would know the child you are adopting is an occult but since I guess some would so there could be a little icon showing the supernatural/ occult sign for the children that aren't human.

I'd also like the sims 2 way back where kids that get taken also ends up in the adoption pool. So much more immersive and cool if another sim can adopt someone who got taken instead of you knowing they get deleted and new random kids get spawn for the adoption pool.