I stated them but I didn't do it case by case, so I'll do it right now
:
DK: his head is out of proportion compared to his body, his fists are too small and his arms too swollen.
Captain Falcon: his thighs are rectangular, his feet are too big.
Link: exagerated traits and proportions
Samus: her legs are too short, head too big, canon a pixel too long.
Luigi: his body is a bit rounder normally, his arms aren't long enough.
Marth: head/torso/limbs out of proportion.
Zelda-Sheik: head/torso/limbs out of proportion.
Peach: actually she's fine :s
Ice Climbers: they're too big if you compare them to their "normal-sized" friends
Snake: head/torso/limbs out of proportion, can't be read very well, colours are too dark.
ZS Samus: head/torso/limbs out of proportion.
Wario: there isn't that feel to the sprite, that thing that makes it recognisable or that makes you say "Spot on!"
Diddy: black outline, arms not long enough and hands should be a little bigger as well as feet.
Toon Link: no facial details.
Ganondorf: head is a bit too big, a bit more contrast needed in palette.
Roy: the proportions-> he isn't supposed to have big hands, an RPG face (some people will slap me for that). His boots are a bit bigger I believe.
Falco: thigh/lower leg ratio not right, too much lower leg, hands not big enough, shoes too thick.
Ike: head/torso/limbs out of proportion.
I think all the "normal" sized sprites should be a few pixels higher, too, because for now there isn't much room for loads of detail.
But I may be completely on the other side of the sprite style (yes, I know that part of the style is mentioned on the sheet and I have read it), for instance on the Ike, Roy, Marth, Peach etc. style.