OK. I see. You want monsters and NPCs to be created just like PCs are created. Geez! That would be a LOT of work on Larian's part because NPCs are created in the same way as PCs. They don't have Character Levels like PCs do. They have Challenge Ratings. So Larian would have to create all their monsters the hard way from scratch instead of taking already done for them monster stats and maybe tweaking them.
Really don't think it'd be that much work at all.