I was just watching some URF videos, then I got to thinking...
Syndra's new max-W Passive's going to give her a ton of extra damage in URF, especially when she can set up Q balls and activate her Ult so quickly. Combine that with her stun and she's going to be an actual threat in URF. Then there's also Kalista's new (old?) Rend mechanics, which (while it wasn't so terrible to deal with due to high CDR) will increase her viability in URF and allow her to stack spears whenever she wants. Lucian's increased damage ratio's going to make him usable again as well. There'll be more changes to champs before Riot ever decides to do another URF weekend, but we should start paying attention to the nerfs and buffs on champs in successive patches before URF comes so we can be prepared to use and deal with them.