Marios bair is still jesus, his flipkick seems to have more range behind him now, but less in front, dair is rather small of a hit box till the last hit (which is pretty big) and it only hits around his arms., his nair is slightly smaller too. fair seems slightly "longer" but, the hitbox for spiking is later in the animation where its smaller.
ftilt seems longer, dtilt seems pretty much the same hitbox wise. fsmash still has a sweet spot, longer range, dsmash seems shorter range, usmash hits more behind him now, and is bigger. (like luigis in melee)
fireballs are the same size, cape's hitbox seems "thinner" and hits behind him way less. (harder to cape things backwards). upb is still fat and juicy.
hit boxes seem to deminish faster all around though.