What I think would be a cool addition to Olympus would be to add more rebirths, but not more god rebirths, titan rebirths. I think that the current rebirths of the Olympian gods should be accessible at god rank, and then add new rebirths for titan rank (like Kronos, Gaea, and other titans). Maybe for titan rebirths, there could also be trials which you have to complete (like a combat trial, puzzle trial etc). They could also cost 50 million cash instead of 25 million. Also, these rebirths should probably have even better rewards than the god ones.