So skinning is pretty much like mining and herbalism that it's just for gathering leather so with that being said can you level it from 1-600 from just skinning MoP mobs like you can with mining?
Yea, I don't think they have made it like Mining and Herbalism yet. You have to be a certain skinning level to skin a certain level of mob.. there are various areas to level where there is a high density of mobs tho. Just search by the leather type on wowhead and look at the comments, usually people say where a high density/easy farming area is. Light Leather, Medium Leather, Heavy Leather, Thick Leather, Knothide Leather, Borean Leather, Savage Leather, Exotic Leather ... I think those are all the types throughout the expansions. Last time I leveled skinning it was like 5 skillups per npc level increase (Ex: level 1 npc you need to skill to 5, level 2 you will need 5+ skills)