For combat, I don't see why this isn't doable. It works. I've done it. Video game pawns and maps. So why don't those rules translate exactly?
Of course it can be done: see Solasta.
Still, tabletop and digital games tend to feel different to play. You know, a bit how card mechanics always feel off (at least to me) in a computer game, even if its a fun game. I think Larian really doesn't want their playerbase to feel like they are playing an adaptation of a table-top experience - but rather a game build from ground up to be a cRPG. I think it's more of a "game feel" that Larian has issues with.
