I really think that URF is a bad gamemode.
There. I said it.
Half of the games are over in champ select, it's nearly impossible to play on patchy internet or on lower-end computers, and there is a fundamental disconnect in whether or not it is meant to be silly or just fast-paced (half of people are playing to do goofy things with low cooldowns, the other are trying to abuse things that are broken by having low cooldowns)
It's a neat idea, but poorly implemented.
If you enjoy it, that's understandable. I don't, and would like to see some different gamemodes getting as much attention as URF.