It is easy to come up with a change that fixes a problem in PvE, or a problem in PvP, but many problems are VERY specific, such as prot paladins with 4 pc t8 / Pandoras Plea in 2v2, or a certain spec / glyph combination against a certain team about wow gold (FoK Rogue vs a Wizard Cleave for example).

If you nerf the FoK interrupt for PvP reasons, you could really hurt people doing 0 keeper Yogg as FoK interrupt can be very important on the fight, as well as others, and if you nerf Prot Paladins because a certain gear setup is too strong with it, then you are mostly punishing the people who do not have access to that gear in the first place, because those who do will probably be able to get along just fine with their gear to get wow gold.

It simply is not easy for them to balance all aspects of the game when there are so many factors to consider, and that is why trying to have competitive PvP on the same patch as live servers just is not the most effective path about wow gold. Some balance problems here and there are not the end of the world when playing online for titles or rating, as overall the game is quite well balanced, and getting more and more balanced (in my opinion) every patch to get wow gold

It does however become much more of an issue when trips, sponsors, and big money are involved, so if a seperate patch were to be developed and made available for Tournaments to combat this problem it could really make life a lot easier for everyone involved, while really improving WoW as an E-Sport. I think with a "PvP Patch" available to anyone who wants to pay a fee to play on the Tournament Realm, you woul see a huge reduction in complaints from people demanding more balance for serious PvP, and I definitely could see a more balanced WoW getting the respect it deserves from the E-Sports community.