At our Best Buy, we got two rounds of two minute matches; I managed to get through the line twice, but I split my attention between Oli (Brawl main) and Greninja (likely my Smash 4 main). I also played the 3DS version, but Oli was absent from that unfortunately. Anyway, I've already made an analysis once, so I'm just gonna copy paste my thoughts I posted on FB:
So, Olimar. I'm not happy with what the did to him (even though I won every match when I used him). His Usmash has been tremendously slowed down. Oli points up immediately, but the Pikmin has a little spinning animation before it goes up. His Uair has also changed; it's just as fast (seemingly), but Oli now takes the Pikmin by the stem and rotates it around his head. Never landed it, so Idk if it's still multihit. His Fsmash seems to have more ending lag. Also, his recovery is weird. You can attack out of it at any time, but right after, you go into helpless. If you don't do anything, you go into helpless. I didn't try to land with it to see landing lag (ya know, cause free for all). Now, his grab. It's faster now, like many of the tether grabs in Smash 4, but it has been shortened quite a bit. It's not quite as short as P:M, but definitely closer to P:M than Brawl I felt, just a lot faster. I could be misremembering, but even though the Pikmin coming out and going back is a lot faster now for the grab, it seemed as though that Oli couldn't move until the Pikmin came all the way back. As far as throws, I never grabbed the opponent under 20ish percent because FFA and getting used to the pro controller, so I wasn't able to test out his Dthrow to Usmash/Fair combos. Other than that, his floatiness and physics seem the same as in Brawl. Dtilt to Dtilt doesn't combo.
I'm going back on Saturday, so I'll be able to test more stuff out then.