I think a cool game type would be a Death Run game type.
It gives players a nice rush of adrenaline as they dodge and weave through a course. This also could possibly become another non-tryhard game type.
If you do not know what Death Run is, read this:
Death Run was originally made in Garry’s Mod but has reached out to many games. In Death Run, one player is chosen as “Death” while the other players are runners. The runners must go through a course full of traps that the Death triggers. If you die, you are out. If you make it to the end, then you must run through the control room where the Death is and kill him.