New Meta/Gameplay Styles
Just giving my personal thoughts on this (got bored, felt like posting stuff), but in this game we're expected to try new ideas, right? As with the Nunu and Singed incidents, people can't get banned for playing off-meta. They can, however, be banned for ruining the experience for teammates.
I don't understand how we're supposed to try new things if we only have 5 options in draft mode (top, mid, jungle, bot, support). Of course people will object to off-meta ideas. It may ruin their experience, which makes perfect sense. However, if anyone has noticed, once something off-meta (or anything unusual) is done in pro play, people will immediately go to it. I'd bet MF supp would be another Nunu and Singed episode if it happened before pro play. It would "ruin the experience" for the ADC.
New ideas often get shut down, either by Riot nerfing it into oblivion, or the players reporting it into oblivion. Now, some things are perfectly reasonable to question. If you had someone go queue for support, then go counter jungle, very obvious reason to hate. If they did that in the LCS or something, then everyone would do it. In short, my point is that except for the release of new items and champions, along with buffs/nerfs, not much can truly change in the game. Any changes are really just additions to the current meta, but try doing something completely different (I recently had an idiot dodge because they didn't want Twisted Fate jungle, which is actually not that bad) and people will look away. New ideas will be hated, be it idiotic or actually strategic.
Point in short: there's not much room for creativity.
is the most recent example of this.