Hi, all bugs really SHOULD be reported via bugtracker, there is no other tool better than this. First of all local developers might not be skilled in english enough to read through long posts seeking for reported bugs, second it is much easier to track down any reported bug for normal user there and check whether it was repaired.
And it would be much more helpuful to bring original formula when reporting some low damage bug. Many people would consider your reports plain crying if you don't bring any hard data.
My feral druid (47) in lvl 45-47 greens + enchants and rare +agility polearm can do some 150 dps on dungeon bosses while present mages in comparable equip go around 450. Without any further calculations I can judge this IS bugged. But still, I checked Bugtracker for any sooner reported issue and yes, it is there. So now I'm waiting for repair.