the only thing i have to say about adding the monk class is its a not a class i like very much. i do like slapping zombies like the next guy, but i'll rather do it with a staff or a hammer and listen to the rips crack.
I believe that d3 is lacking some kind of finasse char and yes the monk would fit perfectly.
I'll rather have a zon or rouge/assassin instead. lol yes its fun slaping zombies around with ur hands, its like NEO in the matrix BANGING AGENTS SMITHS all over the place and i play the matrix game so much that it has got me so bored of fist banging shit.
If the monk does become the next class instead of rouge/assassin type just make sure u stay away from me because i will PK ur ass with my barb. i hate wanna be neos