Like clockwork.
When (AR)URF goes away the board starts getting threads about how the game mode was the best in the world. When (AR)URF is live threads starts popping up how Riot is being idiotic to allow URF/ARURF instead of ARURF/URF.
Personally, I feel like Riot should just allow many of the bonus gamemodes (including both ARURF and URF) and let the players queue for individual ones or a special party-mode queue (for some bonus xp) that can land you in any of the modes. The party-mode queue would serve the purpose of filling out the specific queues where needed and the specific queues would allow people to get the mode they wanted (at the cost of a longer queue time).
Take the MMORPG approach essentially and start introducing roulette queues that give bonus rewards X times per day to facilitate queue times.