My main, Coriel, is an enchanter. One of the new changes to enchanting in Wrath is that enchanters can create scrolls of specific enchants and sell the scrolls on the Auction House, rather than having to troll Trade chat if you want to sell enchants.
I tried out the new system the other day, grabbing an Armor Vellum off the AH and making a Scroll of Enchant Cloak - Greater Speed. I put it up for sale at pretty much material cost. To my surprise, the scroll sold. This is great for me because I'm only at 430 enchanting or so, and if I can get the skill points by selling scrolls, that's much easier.
So I went back to the AH. But there were zero Armor Vellum up for sale. Armor Vellum is made by Inscriptionists, and a necessary component for every enchanting scroll you want to make. Now I have to track down an inscriptionist and come to some agreement. This is pretty much the exact process I was hoping to avoid with regular Enchanting.
I really don't like professions to be dependent on each other in this fashion. I much prefer the model where a character can take the crafter/gatherer combo and be self-sufficient for the most part. I don't mind one-off recipes where you have to get an item from another crafter. For example, an enchanter needs a rod from blacksmithing every so often. But to need an item from another profession for every single enchanting scroll made is excessive.
I think Armor and Weapon Vellums should have been craftable by enchanters. Giving that essential component over to Inscription, making the two professions tightly coupled, is just frustrating.