AR URF as the permanent game mode (as riot is trying to find a permanent game mode)
AR URF is the only game mode that has seen to be consistant in its popularity without preventing people to actually going into ranking (as ranking is an important content of the game). It offers a different playstyle from normal gameplay where it's centred more into farming than what AR URF offers. For some people, they would rather have a game where they could smash they keyboard and fight, aka more action, which this gamemode offers. Also, being random champions forces people to try out new champions and potentially give them additionnal champions to like. In conclusion, AR URF offers a different playstyle which touches a larger amount of people from the gaming community. I see great potential to come from this gamemode