I'm not entirely sure myself on that - KO Punch is already unblockable (although it feels a bit superfluos when Mac doesn't lack kill moves) - but honestly, that sounds pretty interesting. Now I doubt Sakurai and co. will give the confirms
had back to him, so it honestly might give him some mix-up potential at least.
Of course, I'm someone who really dislikes the way Mac's playstyle's been enforced. While
Rekzius' Little Mac video did have a major effect on how I view Mac as he is in Smash - especially how platform camping shuts him down - one of the issues I personally have is that Mac's playstyle feels railroaded. Those command normals would help with both those things, and that's a plus (assuming no rework).