You're joking right? Divinity Original Sin is less than 4 weeks from release, and it has been announced we should not expect any new features in the game, rather polishing and adding the ones that are already present/promised. That includes singleplayer AI, weapon & skill selection, etc.
There have been suggestions to capture the 3D model in the portrait box
That's probably the best you can hope for. That and a wider gallery of pre-made portraits.