On the contrary, deregulation (of banks and otherwise) is all the rage, and has been for some time (as another commentator noted, many 2008-era regulations are already being repealed). What I don't understand is how the deregulation is going to only improve things for small businesses, not allow large ones to be even more ruthlessly exploitative. Especially since the trend in many other industries (that aren't nearly as tightly regulated as banks) has been for large companies to absorb smaller ones.
Also, I would guess with more competition from smaller banks, megabanks might actually act more responsibly.
[EDIT] but you are kind of proving my point, so thanks! I said "deregulation" so your mind is already made up on the point.