I dunno, it feels like something that's just gonna be overlooked most of the time and it'll only add unnecessary load times to download a 256 or 512 black and white texture (and yes i do know that it won't extend the load times by super long amounts, but still, it seems like more to download than the usual textures like blank, whiteCheck, etc)
Not that i'm entirely against the idea, my only problem is that the flatshading makes it hard to notice the AO on certain models