For geting more to the point, I was a lot of mages on the PTR and even though I admit that almost all of them were really bad, it was pretty interesting watching mages try to kill me with the new resilience changes about wow gold. Factor in the new paladin HoT which procs every second for 450 from a non-crit flash of light, and you have got quite a humorous situation as I can spend most of the time pumping damage into the mage. My personal opinion is Blizzards development team logged on the PTR as a mage and within 2 minutes of dueling people (especially healers) and realized "wow gold, we need to do something about mages quickly; otherwise we are going to have another shadow priest next patch." The outcome: the introduction of mage MS about wow gold.
Not to digress too much but I will say that my overall feeling with all of the new changes on the PTR as a paladin was that it was significantly easier for me to stay alive against every class with exception to warriors (more on this later), who are still ridiculous to heal through. This is all the right direction for wow gold, I just hope it does not go back to the days of WLD.
However, it has been a fun experience for a lot of high-caliber players right now simply because they actually have an option when looking to be competitive as opposed to TBC where players essentially had to re roll if they were using a weak class. Personally, I look at comp options for healers when I look at which expansion has been more successful for competitive arena about World of Warcraft Gold.