Little Mac's seriously not even that bad a MU imo. It seems pretty even.
He hits like a ****ing train, and dominates neutral against any character that relies on the ground game to win. AKA us, which means we probably won't be getting super high aura before dieing, but Mac's such a polarized character that we don't need high aura to win against him.
Seriously, I know it's been said a million times before, but his recoveries and landings are absurdly abusable. He has two options to recover, and you can abuse both every single time he goes with either. he has to have exact positioning to go for one, so you can just sit and see where he's going and meet him there to make sure he stays off when you get him off. Lucario's dash attack, and throws both put little mac in a bad position and completely shift the momentum around for you to do this.
KO meter can be ignored to some extent in the same manner. Wait for him to get close to KO power, toss him in the air or over the edge, abuse his landings til it's gone. It rises a lot quicker when he takes damage rather then deals it, so it's not that hard to trigger on your own terms. Just don't get scared and try and roll because every single little mac who's worth there salt is looking for a roll. He can also combo nuetral air into it as well, but again, not hard to avoid if you know what to look out for. Basically don't play scared. :T
Just never let him take you to FD/Omegas and you're gold.
Fox on the other hand I think actually is bad. Lol. He wins the nuetral game like mac, but unlike max, he can recover, has a reflector, and can combo us pretty much as hard as we do him...so. Yeah.
Um.
I'm honestly not sure what characters flat out BEAT Lucario at this point. I think just strong characters Like Yoshi and Shiek can go even with him, but it's hard to say if anyone flat out has advantage over him. I dunno. We'll have to just see how things pan out.