I am begging you, as someone who thinks staves look amazing and beautiful in combat, I find it disappointing that they are outclassed by wands in every way. Wands themselves don't need too much of a nerf, but staves could use something that sets them apart from the crowd.
In addition to that, since the first Divinity, I always thought it was odd that sword and wand was never a useable combination (I did that until I found out that dual-wands was the way to go in EE) In the first divinity, it was either sword or wand regardless of whether or not both were equipped simultaneously, but that has also migrated to D:OS2 with no significant changes.
As well, something I found the first Divinity lacking, and I will doubtless find the second to lack if it is ignored, is the day/night cycle. I've already seen that your studio refuses to add it to the game, but that ruins the immersion so easily, when in D:OS EE you have eternal daylight, everyone standing in the same spot all the time, shouting the same 4-5 lines of dialogue. It doesn't make the world feel real.
Also, enemy balance is a big deal right now too. I have 6, maybe 7 ap in D:OS 2, so I can maybe move 6.8-7 meters and then attack 3 times. Why, then, if they should have the same AP pool, do the enemies charge 10 meters, then stand still and attack me anywhere from 4-6 times? I've had wand wielders wipe my parties very easily, just by being there and using 12-14 AP worth of attacks in one round to kill 1-2 of my teammates.
Other than these issues, I haven't found anything glaring that I'd enjoy seeing improvement on. But as a message to you guys, the developers, I find that it's important to note:
Please, do not feel the pressure to rush this game. Late is better than never, when it comes to what you would want to release, what would make the game complete. Keep that in mind, and this game will be a bombshell, just like the first one.