Why are people so keen on regular URF over ARURF
I find ARURF much more appealing.
Regular URF is just going to be filled with Syndra, Yi, Veigar, Annie, Rumble and other champion spam. Someone will have the argument of just banning them - but that type of thinking is so poorly misguided. The reason we have 10 bans is because there are 139 champions in League and the old ban system would never allow us to truly filter out champions.
ARURF allows for more fairness through randomness - believe it or not. This way not every game is filled with the same champions or bans.
I honestly hope Riot keeps ARURF over URF because the gamemode is much healthier and fun the way it is.