How is this Balanced? (Bard)

[Koltik]

Wish people would make up their minds. We've gone from "BRDs are the worst class ever in PvP, below even BLM." to "BRDs are the most broken class in PvP, above even WAR."

Bards are weak outside of their burst windows. Everyone knows this. This is also part of the problem. How is it good to balance a class entirely around a 2+ minute burst window? If that burst gets shut down, bards are a joke. This means that in party queue bards are useless, and in solo queue they are still useless if they go against a good PLD. In all other cases, their burst is over the top and can do 13k+ damage in under a second.

It doesn't matter which way you spin it, they are designed very poorly right now.