Guild Wars 2

Anet’s shotgun approach to balance is a real issue. The whole concept of a “balance patch” is ridiculous. How can you make changes to all the classes at the same time and NOT expect imbalance to crop up? The player base is infinitely more creative than any dev team could ever be and can/will come up with unexpected builds that bring everything crashing down.

They really need to either A: Open a patch test server so the actual community can help with QA, B: Give up on wholesale balance patches and focus on more frequent smaller changes.

You have correctly identified one of the problems of balancing in GW2. If you try to fine-tune the weight on a scale, you dont do it by throwing two fists full of dirt on each side and see where it ends up going.
You take small, meticulous actions over a longer period of time. Class balance is a constantly changing, constantly evolving state, that cannot be achieved by slapping some big changes on the game every 3 or 4 months. It needs weekly tweaks.

The other major problem is ofcourse how Arenanet refuses to segregate the diffirent gamemodes. And believes that it can balance pve, wvw and spvp all at once using the same scales.
But what is balanced in one, might be kitten in the other and overpowered in the next.