If they fix the horrible abortion that is the AH interface I'd use it more than I do now, which is hardly ever.
It's pretty scary when a game like Rift has what I think is a far better AH than SWtOR.
In Rift, I can click on an item in my bag to search the AH for more of that item to compare prices to see if I want to sell mine or buy more. SWtOR? Nope.
In Rift I can simply search by name if I don't know which subcategory something belongs to. SWtOR? Nope.
In Rift I can check a box for "usable", click "Search" with no other information, and it will only show me all items that I can currently use, presorted for level and class. SWtOR? Nope.
It feels clunky, it doesn't sort properly on the first header click usually, and you damn well better know which sub-category certain things are in if you want to search for them. (This is a nightmare when you haven't memorized what resources are found with what skills yet). It just doesn't cater to the new player at all.
Like most of the UI, it needs help, badly, and I'm hoping it's part of the UI overhaul they mentioned they were working on.