Can more long-term goals be added to League?
Champion mastery was pretty awesome when it got added to the game and it gave you something to keep you motivated to play for a longer time span besides ranked but even with that sometimes LoL can feel a bit repetitive.
One idea I had was maybe champion-specific achievements, for example something like "Get a kill in under one second with Rengar" or "Get a Pentakill with Darius by executing every single enemy with Noxian Guillotine", or "Reach x amount of Q stacks with Nasus".
There could be several levels to it, for example Rengar would have several achievements for killing a champion in less than 3, then 2, then 1 seconds or Darius had to first reach the double to quadra kill achievemnts before he would be able to reach the pentakill one.