Bard synergy and the meta
Its going to be interesting to see bards impact on the Meta and what champs make a rise into popularity. I for one would like to see a champ like Kennen portal into an enemy team or champs without jumps being able to safely fight for dragon or baron.
I played him a few times on the PBE last night and my only concern is the pressure you have to gather your chimes can be a real distraction from the game. It's infinite scaling so people are going to want to colect as much as possible but you miss out on a lot of xp/gold in lane and put your adc in a bad spot if you roam too much. There's not always a good time to leave. Plus if he gets behind and pushed to tower he would get VERY behind since he can't collect his chimes anymore.