ZSS's d-smash chain isn't banned against Fox, this is not differant. Actually, this is, because you can SDI out of it. If anything, playing Peach's will make you mad good at SDi'ing. (=
If anything, I think this matchup is going to turn out to be like you're playing Icies. A smart Icies isn't going to focus just on getting grabs the entire match, and if they pull an infinite off, it's most likely because of a mistake on your part that was avoidable. Same thing with this. Avoid going under Peach, or approaching directly in front of her if she's float canceling close to the ground. Camp, or just stay above her. Expect to see them try for an up-tilt or up-smash, space accordingly with a shineor second jump, and punish.