I just wish ArenaNet would stop considering a Sledgehammer an appropriate tool for adjusting the game balance and that they would properly test/evaluate changes before releasing them or better even talking about them.

The latter is the main issue here. It is more than obvious by now that only a tiny fraction of ArenaNet employees are actually playing/knowing their game well enough to know/predict how changes will affect their game. And since there are no public test servers, the live servers are pretty much in beta all the time.