or to have the return of Doom Bots.
Well this will happen eventually as we've now seen Nemesis Draft added to the line up. So, Riot is working on bringing back some of the old modes as well livening things up more by creating newer modes (i.e. Nexus Siege).
URF was pretty fun when it was initially released but having it 20+ times a year would REALLY get boring. It's fun in short bursts and that's what they did. They said we would have it "at least twice" this year and gave it to us that much, so it's possible it will return again in the future but at the moment it's looking like you will have to wait till next year.