DISCLAIMER: I do not hold the opinion that Mac is one of the worst characters or something. Keep in mind that Sakurai himself said that this is mainly because people assume Little Mac has no nuances and is an insta-win button.
For that reason, I doubt he will be buffed, at least not drastically. Sakurai himself literally just gave advice to Mac players, in case they aren't playing him properly.
Well, I find funny you just quoted the part where he said he has the lowest win rate, let me quote more:
"His low winning percentage is most likely due to the fact that those who think "Little Mac is too powerful!" play as him and get beaten up."
*Sakurai trying to make understand
the abundance of scruby Macs online*
"I think most of you consider him
rather powerful. [...] A lot of people use him because there's an impression out there that he's dominating all the time, but that doesn't mean you can win easily when
you play as him."
*Sakurai saying that Good Macs
dominate, but that doesn't mean is
easy to play the charater*
I'm happy at least his trying to clarify.
WE ALREADY KNOW THAT THE 90% OF THE MACS ONLINE ARE SCRUBS. So I'm by no means impressed about this. And even Sakurai knows the abundance of scruby Macs online like i quoted above.
And he wasn't talking about the Mac players in general when he said that, he was talking about the scruby Macs that think that picking him up is a free win without even knowing the principals of the character or how to play him.
I'm also happy for other thing and is that when they announced balacing patches some people screamed for nerfing Mac. Almost all his ground moves, taking away his super armor or KO punch charging for hit and not for getting hits, and now Sakurai just clarified that's never going to happen.
I like the picture in the OP though.