The single most useless thing, but awesome thing, Riot could add.
[This is about animated summoner icons, and these are for aesthetic purposes. I believe that it can be a nice addition, but shouldn't be focused on mainly, and should be low priority, but should be on Riot's radar.]
So, let us begin on our quest to having animated summoner icons. I believe that summoner icons are bland, and somewhat boring. The point of summoner icons is to show your personality, right? Well, why not have animated summoner icons to show your personality further. So, here it is, animated summoner icons.
Animated Summoner Icons could be given for 590 RP, and show several things - like length of the animation, and what it does. Animated Summoner Icons could also show things like Graves smoking out of a cigar with smoke moving around, or that poro moving through the sky. The possibilities are endless. You could show Riven's sword forming into her large sword, or show Singed's human face, slowly being burned down to his regular face, to show the progression of his lore.
Animated Summoner Icons can do so many things now as you can see, and why not have these things? It could be extremely smooth, and a very nice aesthetic feature to add to the game. Also, these summoner icons could be used for teams, and could show a animation for that team, for 590 RP, which can help out Riot's esport teams.
Animated Summoner Icons, or ASI, as I'd like to call it, should be added in the game, but should not be a high priority. It's extremely simple, looks great, and there is no reason not to add it. It wouldn't lag out anyone's computer after all, because there could be an option to turn off ASIs, and show a still image of that.
So, what do you think? I believe this is a neat feature that should be added.