Idealy Bliz will add to all the existing professions, and not just to the top end(where the new skills will be). I would like to see...
Leatherworking.... Idealy this would get a few Pre spec Blues, stuff on par with the barbaric bracers, idealy a hat, or boots, maybe even a chest peice. Once in specs i would like to see the avaiable items in each spec trippled, yes, trippled. It would be nice to see hunters realy going after dragonscale items(if they were usefull), as it stands tribal is OK but could use some minor buffs, elemental..... almsot a complete rework.
Alchemy...... some caster buffs, like a mongoose pot but for casters,some tracking pots would rock, like a track elementals, track beasts...... New use for transmutes... as it stands the use is kind of limited, it almost seems like alchemy is arround to make arcnite exclusivly, everything else is just gravy, i say change that, make transmtes usefull, super usefull.
Enchanting.....it is a well flushed out trade, a few more low level caster enchants would rock. even if they were not powerfull. a low level one handed int enchant, or sta.... some minor spell dammage on weapons would rock too.
Smithing.... just make it a lil eazyer. Smithing is the most flushed out trade int he game, they just went a lil too far with the difficutly.
Eng... where to start, just doubble the patterns, slap us a few epics that are acutaly buildable(and useable). ok this one just makes me angry, i am not going there.