I found AR URF to be cancer due to 1 team being completely over powered. 1 game had an Eve, Xin and Fiora on the same team. What was my team of, I don't recall, supposed to do that against that? Especially since our team had none of the champs that otherwise would have been banned in normal URF. And if their team was not over powered, then mine was. Maybe only 1 or 2 games were decent in which both sides had no OP champs or both had at least 1 or 2 of them. I also don't recall ever winning against one of the teams who did have them when we had none.
Long story short: diversity is nice, but winning at champ select makes the game pointless. And this is from someone who enjoys ARAM as his main game mode. Since in ARAM it can be turned around at least 9 times out of 10 (from my experience).