This is the key difference for me:
BG adapted D&D rules where they weren't feasible in a CRPG and, in the case of RTWP, to speed up combat.
Larian have adapted many D&D rules to accommodate their own systems and rules carried over from Original Sin, not because the D&D rules were infeasible to implement.
Obviously there's more to both cases than these generalisations, but it summarises how I feel about the way they've adapted it. I don't mind that it's not the same as BG1 and 2 (which remain my favourite games of all time), I mind that we're getting D&D flavoured Larian, not Larian flavoured D&D. They should let 5E speak for itself and drop the obsession with obnoxious surfaces.
Are there any examples of such things?
You could for example perfectly adapt spells with a 10 minute casting time into BG3, but nobody is going to enjoy spending 10 minutes to cast a spell.
