The more faithful they are to the 5th edition rules, the better. The ruleset is excellent, and should be adhered to as much as possible.
I will of course accept some adaption for video game purposes, but it should be where they can't adhere to the rules for technical reasons. Not just "because we think we can make it better than the currently huge success of 5e indicates that it is".
Yeah, this.
Absolute +1, especially because those like myself familiar with 5E wanted/hoped it would be faithful enough to the ruleset to let us recreate the characters/builds we've played in the tabletop. So far, that is absolutely not the case, and not just because of the lack of 5E content available in BG3 yet. Warlocks for example, overwhelmingly often use Darkness/Devil's Sight as a combo, which isn't even possible because Darkness in BG3 arbitrarily disallows ranged attacks into or out of it. That is just one of many examples littered all through these forums where the ruleset isn't implemented correctly and borks character concepts and builds that people may have hoped to reproduce in this game, which was advertised heavily as using 5E ruleset. I am holding out hope that Larian can ultimately deliver on that promise, but right now, they haven't, and I am disappointed in what we have presently in that regard.