Elizabeth Warren actually said...

I have introduced a bill to repeal Title IV of S. 2155, which would undo the Fed's deregulation of the biggest banks.

the loosening ends up having multiplier effects, that once you loosen a little bit you lose other discipline in the system.

the tailoring rules meant that Silicon Valley Bank, for example, did not have to do a lot of incredibly important things.

So it sounds like to me that this is clearly a case of the fox guarding the henhouse all the way through the system here.