About genasi:

There is alread a mod that add genasi to the game, but it´s too overpower. On Neverwinter Nights 2 you have official genasi without mods and they have only ONE racial spell that quickly become obsolete. I hope Larian can found a middle ground since the genasi of Neverwinter Nights 2 is too weak and the genasi of the mod too overpower.

https://www.nexusmods.com/baldursgate3/mods/160?tab=videos

The vampire spawn and werewolf background are also good ideias.

https://www.nexusmods.com/baldursgate3/mods/152?tab=videos

Well, everthing is on Early Acess now, I hope it will be included and balanced.