I also hate the random stuff.
My theory was, that Divine Divinity was based on Diablo (combat and item wise) and they just kept the system.
Do you have a source where Swen said he likes randomness?
Regarding items, I think BG1 was the best game.
Finding your first weapon+1 felt more importent then any item in a Larian game.
A weapon+2 with additional elemental damage was a rare artifact and you started feeling like becomming a god.
In DOS2, even if you find an epic item with exactly the stats you need, you just say:
"Ok, its not bad. At least for the next hour or so, probably even less."
Yes, your idea is great.
The next divinity game will be:
DIVINITY: THE DUNGEON JANITOR GUILD GAME
You are the boss of the guild and you job is to maximize profit by sending random chars to random dungeons in order to find random items.

Prof. Dr. Dr. Mad S. Tist

World leading expert of artificial stupidity.
Because there are too many people who work on artificial intelligence already