This RFC was intended to come with more time before it had any real effect, but alas. Good problems to have.
I propose adjusting the sizes of the RBS walls. I think that a lower wall of 4m DAI and upper wall of 0.33m OHM would be more appropriate. For reference, the current wall values are 14m DAI lower / 1.7m OHM upper. Note that the proposed changes are lopsided and reduce the upper wall by a greater amount than lower -- my reasoning is that the current configuration is lopsided and offers more OHM in dollar terms, and that this dynamic can only worsen. A greater reduction in the upper half today would bring this back into check (though it would re-emerge at higher prices).
I will defer to DAO policy members regarding how to configure this in the RBS system. A poll is included to bring this to formal proposal in its finalised and systemically-accurate state.