Too bad URF sucked. They said times and again they won't do it, it was just a silly thing for a short period of time. They did listen to everyone and extended that time period, but now it's over.
You guys are just crying to have it back, but it's pretty sure that even if they do, the queue for URF will be a ghost town compared to the rest.
It is a game mode that gets really tiresome after a while, the careful balance they put in each champions is completely destroyed and would be additional work for nothing to deactivate all the "OP" champions. People are already complaining about that enough in regular matches, the boards would be spammed with "Rito pl0x deactivate X in URF, it's OP and not fun"
You would have to deactivate almost every champs.
I think remembering they said that they would bring it back again for a short period of time but again, it won't be permanent. It was good fun for the first 5 matches but after that it gets boring.
You think making a meaningless petition will get you somewhere? There's already been 3 petitions that tried to force Riot into making it a permanent game mode. Apparently they all failed.