User blog comment:BIA-Kaboose/The Problem Behind Balance/@comment-5331854-20131211115121

The main problem (but a problem Riot's getting better at with each rework and new release) is that a limited number of people can only achieve so much. Once it's out of the PBE, you get a theoretically unlimited number of people and, as we can see in many fighting games, this unlimited number of people will find many things the developers had not seen.

It's part of "Fake Balance", really. Because something being "theoretically balanced" often has flaws nonetheless. For the most obvious example, I'll quote the description of the unbalanced skillset from the link:

"If a character has a move set with a few overly powerful moves, the counterbalance to this may be to have several moves be near-useless. But the existence of bad moves does nothing to reduce the effectiveness of the good ones. A skilled player is likely to exploit the good moves while ignoring the useless ones, often taking away from the variety of the game."

... So, yeah. On paper, OP moves can be balanced by having UP moves as well. In reality, people will only use the OP moves anyway and ignore or seldom use the UP moves.

Until Riot's finding the perfect formula for their champs (and I don't think there's THE one and only solution, since Riot's also relying on that thing called Perfect Imbalance which works quite well for LoL), they will rely on the data input given by players, especially from Diamond-, Challenger- and Pro-Summoners.

So, in that sense: Keep shouting "OP" or "UP" if you have a reasonable basis for your claim and Riot will hear you out. Because it's part of keeping their business alive and because fixing stuff that needs to be fixed is what makes customers happy until they find the next unfixed thing (because, let's be honest, the community can be pretty demanding and unpleaseable).