The demo had uneasy targetting, this was fixed in the full version. Also, I don't know if you realize this, but in Divine Divinity, you didn't have to keep clicking an enemy to attack it.
There's more items in BD, and all of them look different on the character, unlike in DD. Now, for instance, you can equip a straw hat, and it actually looks like a straw hat.
As for options... What options did you have in mind? (Concidering BD is a 2D game...)
Tovi 
