after busy showed me a look at the MU (didn't get to play him yet, but saw him fighting a lucario who had some good exp. in the MU), imo luc v. ICs is probably even.
MK is so nasty, snake is probably even.
and to add onto the peach discussion, from what I saw squall's pretty useful for using against Peach glide toss (unless it's a bob-omb/other lol-worthy pull), blizzard is also pretty useful in crunching her float into a more easier spacing game. I agree with what everyone said, imo ROB > Peach by far against ICs