Unfortunately the ranking structure for our ranks prevents us from adding any more ranks frivolously. It's not a matter of, "Hey, just slap a new rank on the pile and it's done!" Minecraft's ranking system is a lot more screwy than that, and limits us in a lot of ways. If we were to add any other new rank, we'd need to redo the entire network to make sure the rank properly integrates and functions with the system (and debugging is a serious pain). I am honestly surprised that Quantum managed to work as well as it did; thankfully that was a Premium rank whose perks were primarily outside the game.
So from a development standpoint, it's not worth it for us to do, especially if there are opportunities for alternative options out there. Thanks for the suggestion, though.