Rotating Gamemode?

Rotating game modes require upkeep, testing and maintenance, it's not as simple as flipping a switch, things can break. Riot's been fixing old modes that required more to make them work in the client like One-for-All but both of those things take resources from each other and delay things even further. So Riot put a pause on RGMs so they could make better progress. RGM is coming back soon with Blood Moon.