Please add a rank cap of 30. By adding a cap, higher ranked players will have even more to do and wouldn't have to rely on R50 content as a form of challenge.
Make it so this R30 cap prevents players from using any ability above R30 for even further difficulty.
If players were allowed to steam-roll through R30 dungeons on their 50s, it wouldn't be much fun because the challenge wouldn't be there.
Thoughts/opinions welcomed.
P.S, I would use a dev tag but I've no clue which one to use.