Well I'm pretty sure Simon was actually popular to an extent. He was always on the low end of the top 20's no matter where you looked. Kinda easy to sleep on, but if you're looking for a name like that, he'd stick out. Aside from that he's mentioned why he's picked characters like Ryu, and Cloud, and while I don't agree with the choices, they do make enough sense on their own, but they definitely didn't have anything to do with their own popularity, and were more of Sakurai trying to rep series he thought should have reps.
Personally I like 3rd parties, but they're getting a little nutty right now. I was always down for Bomberman, Geno, and Rayman, but right now it seems like there's no limit on who has a chance, which is a bit worrisome when you're a fan of an in-house character that isn't as big as a name comparatively, like Chibi Robo.
That being said, we've only got 2 new 3rd parties so far, 1 being and echo of the other, so maybe I'm overreacting.