Let's face it. Win or lose, everyone loves Mayhem because they're HAVING A GOOD TIME. The grenade, ability, and super spam is just fun. I'm not saying it needs to be permanent, but it needs to rotate in more frequently. It does something the other modes don't really do (excluding Iron Banana.) It draws in guardians who hate the crucible, simply because of the fun factor. Hell, a Mayhem Iron Banner would probably see the highest serverwide Crucible turnout ever (just don't make all the bounties that week related to weapon kills.)