Inherent imbalance and limiting "fun" in the game

Tanks are inherently imbalanced at this point in the game, if not always. Especially bruisers. The damage output with one item is absurd and sort of turns the game into "Who has more bruisers/tanks?" I just stomped in a game as Irelia and, while it is fun to do well, I was upset about being able to easily dump a Rengar and then move onto a Vayne and Alistar.

On an unrelated note, is it ok to show when a player is in champ select in high ELO where everyone is on everyone's friend list and there are so few players you can reliably target ban them?