The crafting side is much easier now. You should be able to hit max rating consistently using most current pentamelded gear and a macro.

It's the gathering side that I'm uncertain of since I don't know how the changes made this expansion affected the gathering yields in Diadem. It took me about 350 hours to get the 3 gathering jobs done last expansion (boring as heck, and making me think twice about grinding this on my alts). I keep telling myself I should drop in to test... then think of lots of other things I'd rather be doing.

If you're going to do it, start with the gathering since you're going to have to gather the mats anyways so it would be wasteful to buy them off the MB.