Blue post saying monks have most potential for improvement. Monk changes possibly incoming
Quote
While there are currently solid build options for monks both in 1.0.4 and 1.0.5, and while top-tiered monks using very specific builds can achieve respectable damage, the class isnt yet where we want it to be. Were definitely aware of your concerns, and we agree that additional improvements should be made, especially with regards to play style options, build diversity, and the performance and budget of monk resources. We feel that the monk has the most potential for improvement, and we have plans to make more changes to the monk after 1.0.5. The sort of changes wed like to make are not simple number tweaks, though.
Ultimately, we want to make monks more engaging to play and really immerse players in what it would feel like to be a fast-punching martial arts master. We have a number of ideas on how to accomplish that for the future, and we want to provide improved passives, particularly passives that can be used for a more offensively-minded monk. I also mentioned two other possible changes were considering in my previous post, but those certainly arent the only changes were looking into. They address another area we feel could use improvement, and thats giving players some additional, more active play style options.
We have more improvements planned and theyre still only in the discussion phase, so were not really in a place right now to talk about them in much detail, but were actively working towards solutions to address many key concerns.
Source
http://us.battle.net/d3/en/forum/topic/6794319883?page=32#629