Gave up on Divinity: Original Sin because the progression curve felt very demanding and it stopped being fun. Game the sequel a try and I can see a lot of improvement. But the core issue remains: no matter how good your tactics you are, your party simply has to farm the stats, or else.
Problem is, the game systematically robs you of XP if you play a certain way that generally involves avoiding combat (via dialogue options, mostly). It's a side effect of several design decisions.