I think difficulties should be separate categories like the GW1 and GW2 speedruns. Because of the current rule of "any difficulty is fine" it completely makes anything other than Casual pointless. What if someone wanted to do a Crazy Ops? They'd never get world record because the record would already be held by someone who just used Casual. I suggest that you guys make separate categories for difficulty.
This is a pretty good idea. I think it's more necessary for things like ops since there are a lot of different difficulties. We didn't make the rule before since we thought the difficulty made almost no difference in the missions.
Enemies on casual don't react as much to the player and they do less damage so once again it should be a separate category (I'm talking about both Ops and PvE regions). I hope something is done about this at some point.
After further inspection of difficulty we've now removed them once again as the difference turns out not to be noticeable.