Regarding open world, I liked BG1 more than BG2.
Right from the start you could go everywhere except the city of Baldurs Gate and some quest related areas . . . if you survive. It was very easy to run into encounters that are much too hard for you.
I liked the original Divine Divinity and Gothic 1+2 too. You can go everywhere from the start, if you survive.
The only condition: There should be several options about what to do next for characters of any level.
In D:OS2 I have the problem that the power difference from one level to the next is so huge that you sometimes feel forced to do encounters in a specific order and you run into problems if you do not know the game so well that you have problems to find an encounter that fits your level.
One more reason to avoid the exponential number groth of D:OS2

Prof. Dr. Dr. Mad S. Tist

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