Hi hi. I'm maining Peach in this game as I main her in Smash 4 (I'm new here lol)
I must say right off the bat. 4.0b Peach is EVERYTHING I EVER DREAMED OF. She has very very strong kill setups and guaranteed combos that do crazy percent due to high hitstun. The float canceling is superb in every way and side B and dash canceling really appeal to me.
I do have to agree that sword characters are not her forte. I also think the Links and Lucario MUs are terrible as of now and maybe her worst MUs due to projectiles keeping her off the stage and possibly gimping her.
However, like in Smash 4, I notice her aerials can cancel out a lot of projectiles (like Ness's PK Thunder). (
Thor touched on this) Instead of buffing her like giving her armor and stuff, why not have it to where either 1. Peach Bomber has more hitbox priority over some projectiles, or 2. Give her aerials higher priority. For example, playing a Lvl 9 Lucario. The CPU likes to spam Aura Sphere a lot while I'm offstage, so I end up approaching from below. I learned her Peach Bomber doesn't clank or cancel an uncharged Aura Sphere, and I can't get close enough where Toad is reliable after canceling Side B's animation, still keeping me offstage. So yes. I suggest giving either Peach Bomber or her aerials higher priority, at least against weaker projectiles like an uncharged Aura Sphere or arrow from the Links. Also, if anyone wants to play, I play on the Wii U's netplay o3o
Hope this helps!