There has been a lot of thread on this forum about game balancing:
Some skills are better than others. Melee underpowered/overpowered. Leech is overpowered. Pets are overpowered. Etc.
And frankly, I don't think it matters!
In a multiplayer game like Diablo, World of Warcraft, Starcraft, or Counter strike balancing is super important. No player should have better chances than other players so all classes needs to be balanced.
But in a single player, sand box, CRPG like Divinity (or Elder Scrolls, Dragon Age, Witcher, or Gothic) I really do not think it is important.
The world is supposed to a sand box. You play in it the way you want. You role play if you want. You power play if you want. You steal if you want. You scum save if you want. You craft if you want. You kill everything that moves if you want to. This is world to have fun in a play as you like it. (Almost) everything is optional.
And if there is something you don't like you just don't do it.
For instance, in this forum I read someone playing the game with just a single character, or with the goal to complete it in as low level as possible (by sneaking by all monsters). I think that is cool. This brings out the sand box in the game - and makes it more like Minecraft or the Sims. And with the incoming MODs I imagine that we will be able to tweak our experience even more.
So who care if someone finds an exploit or cheats?
It all goes very well hand in hand with the no-hand-holding policy in D:OS.