Then don't play them, because there will always, always be compromises made in the adaptation. Everything in a videogame must be specifically put in by the developer and programmed in.
No, you din't got my point. Not implementing wish or implementing a limited wish list like BG2 did is OK. Uterly changing the rules and nerfing things NEVER was good.
That said, you can't have a 100% equal to a P&P screen experience but ToEE(Temple of elemental evil) is the most faithful D&D adaptation while SCL(Sword coast legends) is the least faithful. As for grapple, a lot of spells on NWN1 uses graples. Eg - Black Tentacles
The grapple check used to determine whether or not a tentacle hits a target is as follows:
1d20 + caster level (to a maximum of 20) + 4(tentacle's strength modifier) + 4(tentacle's size modifier) versus
1d20 + base attack bonus + strength modifier + size modifier.
source > https://nwn.fandom.com/wiki/Evard%27s_black_tentacles
And note that pathfinder kingmaker has a lot of mobility checks to climb certain areas of the map.
There are a big difference between not implementing all possibilities of P&P to DESTROYING a class like NWN2 did with warlock, like NWN1 did with pale masters and necromancer specialized wizards.