Shadowheart is almost obligatory in the party due to being the only character with magic healing. We need more choices. Bards, druids, etc. and maybe some races like halfings or gnomes for them :P
I wouldn't mind Non-Origin characters that can join the party, like regular companions.
+1 considering taht shadowheart is not even a life domain cleric XD, i would love a system that let's you create a couple of main chars from the beggining like divinity 1 or wasteland 3 2 is enough for the group basis