Honestly, if you wanted to "remake" the BG 1 and 2 games, you'd be better off using Obsidians Pillars of Eternity approach.
It's far closer to matching the mechanics and art style and those guys tried to model their game off the original BG games as closely as possible.
I don't think BG3's engine would be a great match for those games TBH
I tried Pillars of Eternity. And I didn't like it much, at all :
1. Rules hablve evolved too far from DnD, it took me quite some time to readjust...
2. What's weird is that, in fact their system makes more sense, and is more adapted to real time combat too, but yet ultimately I hated it...
3. Finally, real time combat? No thx, the turn based combat with radial movement (no hexagon/square) FTW.
