Just like mobile cashgrabs "house rules", just like sword coast legends "house rules" and so on.
We don't have a decent D&D adaptation since nwn2(2006) and even nwn2 requires heavy modding to be faithful to P&P(spell fixes and warlock reworked are must have mods). There are so many cases of "change as they see fit" producing worse effects.
The pen and paper version uses imagination for fuel, and the operating system is the human brain of the Dungeon Master. Any adaptation away from that system is going to be more limited by definition. A computer game requires that all the content and the systems be put into the game, into a sealed box which cannot be modified on the fly. Making a fun system has to be the priority, because there is no DM to smooth out the wrinkles and add in totally original content.
But having no +caster level on clases like pale master on nwn1 and only one summon limit is not fun. Arcane archers incapable of imbuing any element but fire, which is the most resistent element too, not fun. Warlocks unable to grapple enemies with chilling tentacles cuz instead of caster level + 8 BAB, they have a fix +5 to hit on nwn2 is not fun too. Removing spell slots in favor of the boring wow style cooldown spellcasting on sword cast legends is not fun too.
And this not talking about mobile cashgrabs...
The reason why we are wanting an more faithful adaptation is cuz the "lets bend the rules in favor of <<insert any excuse>> " produced worse games. Even Pathfinder Kingmaker, has his fair share of problems due bending rules. For eg, sneak attack. An arcane trickster with hellfire ray can apply 6 sneak attacks per round which is ludicrous in that game. I love pathfinder kingmaker, but if was more faithful, would be even better.
What should't be faithfully adapted is things that can't work due media limitations.
For eg? Wish spell. Not even the most advanced AI can act like an good DM with Wish. So, an "wish list" which the player chooses like a dialog from BG2 is the best solution. And 2e/3.5e had far more hard to translate spells. Mainly on epic levels. Raise island for eg. Not mentioning divination spells.
