The new patch is here!

[Omni]

Actually, the concept of diminishing returns for repeated crowd control spells in PvP was done in DAoC prior to this (two years ago or so?), and relatively effectively.

Mythic tried diminishing returns and it didn't work, then they tweaked the system a couple times and it still didn't work, so they finally threw their hands up and put in the one-minute timer. Now, if you aren't playing one of the primary crowd control classes and you use your short CC, you'll get yelled at by the primary crowd control people because you've just prevented them from using their uber CC for a full minute. DAoC is as patchwork as it gets.