When I play BG3 I don't compare to or think of Divinity. I think of BG1&2. While BG3 is an ambitious game with high production value, there are still important things missing compared to the original games.

The feeling of exploration. The theme park map of BG3 where locations are too close to eachother doesn't evoke a similar feeling of scope and exploration I had in the previous games. Going off the path or being lost in the wilderness doesn't happen, and convenient teleport runes are literally everywhere.

The lack of night and day dynamics is another big one. It's hard to get immersed in a world where night or weather doesn't even exist.

So while the leap from DOS2 might seem big, the leap from BG1&2 not so much, and in some areas the leap was backwards.