I don't know I love Larian but I think they changed a lot from 5e that they really did not have to change. I play 5e on a regular basis and it's very beginner friendly. People picking up the game I don't think would have issues learning the system even if they dont D&D. BG 1 and 2 were pretty successful and used AD&D's confusing ass system to the tee and at the end of the day people loved it.
I agree that Larian changed a bunch of stuff they shouldn't have... that being said, BG1&2 really don't follow 2e rules to a tee, they make a lot of their own tweaks, albeit mostly out of necessity due to RtwP. Still the games that got me into both computer games and roleplaying though.
Also, they were pushing a lot of changes that would come out in 3.X, such as dropping level limits.
I disagree on the changes to 5e for the purposes of a CRPG vs TTRPG, certainly they COULD do a more accurate version, but I'm remain unconvinced that would be a good idea. But no, I don't think there's a problem with learning D&D from this.
