Big changes coming this Thursday are with the user interface options. I found myself in awe at what you can do with them in the editor. for example, I play on a 27" screen and I've always found the HUD to be too big. using an option in the new update I was able to shrink it all down to 0.8 and I moved all the buttons closer together, as you can see in this screenshot below.
I know I'll change it more as I start to PvP and do Ops but I saved this interface I created ready to go for Game Update 1.2. Here's the snitch from Bioware, with a video guide:
Game Update 1.2: Legacy for Star Wars™: The Old Republic™ introduces several new systems to the game, including the option for you to customize your User Interface. You'll be able to alter the placement and size of each UI element to suit your own personal preference.