The Urf and 1 v 1 duel modes in Blitz are pretty horribly unbalanced.

Take it from me as a Yi and Jax main, at level 6(when the 1 v 1 mode tends to happen) I will win the 1 v 1 in maybe 90% of cases using very little skill to do so. On Summoners rift I force these 1 v 1s through Macro so there is a deal of thought and skill involved, but when forced in a ring against any ADC not named Vayne, any support, any mage much of the Bruisers and Assasins and practically any tank I will comeout on top by rightclicking them to death. Same for URF again this is favorable. I've been trying to learn Yasuo there and everytime that mode comes I can hardly win.

Remove or Rework these modes they are horribly unfun, especially the 1 v 1 ones.