Honestly Ridley seems like he's fairly overpowered. Even if he's about as light as Mario, he's still got a lot of range in his attacks, arguably about as much as Cloud. I also saw him performing some pretty strong-looking aerials in his trailer. That's not even bringing up his down special which deals 50%+ AND leaves your opponent vulnerable for a follow-up if sweetspotted, which seems about as easy to land as DK's forward aerial.
I don't think he's gonna be fun at all to play against, at least in the first few months of release.