Timeless physics is what you end up with if you take MWI, assume the universe is a standing wave, and remove the extraneous variables. From what I understand, for the most part you can take a standing wave and add a time-reversed version, you end up with a standing wave that only uses real numbers. The problem with this is that the universe isn't quite time symmetric.
If I ignore that complex numbers ever were used in quantum physics, it seems unlikely that complex numbers is the correct solution. Is there another one? Should I be reversing charge and parity as well as time when I make the standing real-only wave?
Maybe "the multiverse" would be a better term. I mean the configuration space for the whole universe. It's at least 10^80d, and many suspect it to be infinity d.
A simple way to make a standing wave would be to take one possible configuration space, and add versions of itself that are off by time t (with tricks to make it come out finite). Thus, you end up with the universe being a standing wave using the time we're all used to, and all the predictions being pretty much the same.
This is not possible because different particles oscillate with different frequencies, depending on their energy. And though it would be possible to make a "standing wave universe" work by simply adding a universe to its complex conjugate, writing it as a sum is probably the shortest way to write this universe, so it's not like we actually got rid of complex numbers in any equations.