Both franchises are great IMO.
It is true that in divinity you have more freedom/choice in combat and character progression.
This allows for more flexibility of items, allowing more builds. Which is IMO what made DOS the best RPG of its time.
It does feel very limiting at first playing BG after divinity.
However, this is not DOS 3. This is BG3
The game is overall really well balanced (if not more-so than DOS) and possibly more tactical because you can't "break" the game like you can in DOS.
No its not DOS 3. But if Larian was going to make a game with the same ruleset they probably would of called the game DOS 3.
There are people that are on both sides of the fence.
People who want it to be more like D&D 5e.
People who want it to be more like DOS 2
I hope we see a continuation of both franchises in the future.