It's not a secret, but it's not going to be talked about on here. Though if you ask a dev member in person they'd probably tell you the details. The only thing I'll say on the matter is that everyone, exluding puff, has gotten some kind of adjustment, the extent of which I'm not sure.
Anyway 3.5 is going to help wario a lot, considering he'll actually be able to gimp a larger portion of the cast, especially tether characters. I personally love it because I won't have to work 3 times as hard as my opponent does, who's recovering, and risk getting edge guarded myself in the process. Also the stage picks are going to be a lot more interesting, since your thought process isn't going to be, "oh great, they can get back from everything and I can't, better pick a small stage".