Got to play this today with a friend for about 5 hours and I'm very satisfied with what I saw, been waiting for this game since 2008
Experienced a couple of odd behaviors, not sure if they are bugs or not, I saved the replay but it was on the offline version so I doubt it will play correctly.
1. Wolf was standing near the edge of yoshi's story (Melee) on the slope, and was hit by a weak attack (I think ROB ftilt) while shielding and he instantly fell down to his death like he was spiked (No damage tho, he just slid from the edge but it looked too fast and weird)
2. ROB Fsmash sent lucario at a very low angle (Like a fox shine) near the edge of FD.
Keep up the good work, this game is awesome