I doubt the Wizards put any pressure regarding this on Larian. Sincerely. They're rarely worried about this sort of thing, it's for them - way more of an advertisement than anything else. Many games under the D&D banner only very loosely adhere to actual ruleset. When BG2 came out, 3E was already there, too. Of course, that was TSR, still.
And even still, this OneDnD thing - gods I hate that name - is hardly different from 5E from what I understand. A little too much with the inspiration thing, but I'd homebrew that right out of there.
Didn't one of the recent content creators videos reveal that WOTC has almost nothing to do with the game, speculating swen negotiated a non interference clause?
At the end of the day the rulesets are imperfect ever changing tools whose only purpose is to try and make a fun table top game, customization is a huge attraction for audiences which is why you see the rulesets shifting towards it.
Rules purists, especially those who follow specific editions of rules like some sort of canonical text miss the forest for the trees.
Stuff like gnomes getting +2 int makes no sense from a lore perspective anyway, when humans are far an away the most accomplished wizards lore wise.
