This idea will probably get shot down, but maybe a rank between gold and diamond would be nice. If a gold wants a higher rank, he/she has to shell out a LOT of money, as compared to the rather small upgrade from iron to lapis or lapis to gold. It's a simple idea and I don't expect it to be added, but it would certainly be nice to be able to support further without having to pay what is for some people an entire day's paycheck.
Thanks for allowing us to meet here!
Long time no see!