It's not just MY hope - there are way too many possible combinations for the developers to hand-craft more than a tiny fraction of skills, but yeah probably unrealistic. It's hard enough getting good balance from the baseline skills, never mind if an algorithm combines them.
What I don't understand is why Larian would promise new features like this without already having a strategy to make it work.
It reminds me of the No Man's Sky debacle. (Though I'm not suggesting that D:OS2 will be a similar trainwreck.) They kept making promises even though it's now clear they had no idea how to keep them.
It seems like there are really obvious issues with the memory system, armour system, spell-crafting, etc, and they should have been aware of these issues long before now. I'd be much happier if they'd limited their promises and focused their attention on a few features they could implement properly.