Firstly, I would like to state that I am a huge fan of this game and although I may express my dissatisfaction with some of the recent changes it doesn't change that fact that I want to see this game succeed.
With that being said I believe that the expertise changes that were made in patch 1.2 have significantly altered the gameplay, but in a way that makes the game less tactical and strategic. The expertise scale is now out of hand because the damage being put out is much greater than our ability to mitigate it and heal through it. In my personal opinion, expertise was fine pre-1.2 and it was only minor class changes that needed to occur. It is apparent that many people are unsatisfied with the changes made in 1.2 and reverting back to the old expertise system may be a solution worth taking into consideration.