I suspect that these rulings are going to affect a small percentage of students. Very small, like maybe the very most desirable ones. I do think though, that colleges are going to start offering more perks to ED applicants and that deposits are going to get bigger. I’m not sure they will force all to abide by that though. I’m guessing a full pay kid won’t have an option for a smaller deposit, but a kid with more FA will.
FWIW, Dickinson College wanted an $800 deposit a few years ago when my D was considering it.