Say what you want? Why? The lore and the balance teams have been doing some amazing work.
The lore team has been a little slow, that is true, but amazing stories take a lot of time to concept and then create. They could rush it and put out some stuff above the average OR they can take their time and produce amazing stories. They are clearly taking their time and props to them for that. Bilgewater, this Shadow Isles followup. They are AMAZING. Maybe it is just me drooling over them as an aspiring writer, but yeah.
The balance team? The game is the most balanced than it has ever been imo. Just because the community finds something new to bitch about every 3 months don't mean the balance team isn't working properly. Some time ago it was Vayne, Riot confirmed that she is getting changes with the Marksman update. Now it is Jinx. She'll probably get some change. Then it will be Kog and Tristana. Then Corki. Then Caitlyn again and so on. If anything I'm hoping that the balance team does not in any way take feedback from players, at least the ones here at boards, because players' opinions are so conflicting and biased, if they got their way, they'll drive the game to the ground.
But anyways, my little rant put aside, yeah. The art team has to be my favorite. The sound team is fantastic as well but the art team is just top notch.