Larian Studios Forums Divinity: Original Sin 2 Divinity - Original Sin 2 - Suggestions and Feedback Possible DLC Idea.

I think it would be fun if sometime in the future Larian released a second campaign option. Not a full fledged one, but more of an infinite dungeon that is randomly generated.

Just a simple survival scenario that will keep you guessing at what comes next.

Is there a way to have random generation with the GM system?

This game is already awesome and i'm pretty sure there're still a loooot of stuff to do that could make it even better, your idea is one of those stuff.
Hopefully Larian will do it.

Randomly generated stuff is difficult to get right, and hard to balance at the best of times. In a game with this much flexibility, it would probably be impossible to make a well-balanced experience.

My impression is that Larian is much more interested in making a good handcrafted experience, and the amount of resources they would need to sink into making a random dungeon generator would be prohibitive.

That would indeed probably be a difficult task to do, and doubtfully really what Larian aims for. Though you do have modders ... Perhaps the mod Cromcrom is working on may be of your liking?