BG2 was extremely shallow in its implementation of the PNP rules,
Except that BG2 was an mid to high level adventure with tons of classes and spells. The amount of spells and classes on BG3 is too limited, at least on EA. We don't know if animate dead, fireball, stop time, etc will be in line with P&P. Or even if sorc metamagic will be in line with P&P. Hell, playing the EA, I saw so many ludicrous things. Lv 1 warlock easily killing 3 intellect devourers, an arch druid who is a lv 4 NPC unable to cast tier 3 spells...
And 5e has so many awful things. The optional rule to make maces better vs plate armor? Gone.
The Oblivion style HP bloat which makes high level game play(15+) extremely boring,.. Back on 2e, a lv 0 commoner had d4 hit points and a freaking demigod legendary lich called Vecna had 150 hp but even deal 1 pt of damage to him due his immunities, spells, traps, AC, SR, etc; was insanely hard.
2e din't had number bloat.