League of Legends, A Flower in Wilt
The game is too complex to ever actually be balanced. If ever the designers reached a point where they believed the game to be reasonably balanced, very soon thereafter someone somewhere would discover some game-breaking strategy which would require re-balancing again. And then, after that, some new game-breaking strategy would emerge, and so on and so forth, forever...
The situation is made more complicated by Riot's financially-motivated insistence on releasing more and more new champions. It's obvious that Riot makes new champions overpowered so people will spend money to buy them, to feel competitive. Riot also artificially manipulates which champions will be overpowered at any given time, in conjunction with the release of skins that people spend money on.
Eventually the game will grow too bloated, and the player base will find it impossible to maintain interest. Then the game will die. Hasn't happened yet, so Riot can still suck money out of its players.
But I see the game as a flower in wilt.