Dear Valve, please make an idle map.
It may seem unintuitive to make a map that people don't do anything on, but if you've seen idle maps, you'll know that people do things on idle maps. People do lots of things, silly things and serious things. The current idle map of choice, Achievement_Idle, is terrible. There's almost no chance for skill interaction, and people still do interesting things.
There's infinite potential for idling maps, since you don't need to make it fair or balanced. There's no need to create round times, or anything like that either. Make an area for jumping, an area for some soccer, and an area for Heavy Picnics. You've made it so that people are going to idle, you may as well give us a playground.