I'm Cory Kolek, also a UI programmer here at Bioware Austin. I originally implemented the UI Customization feature, and I'm always looking for ways to improve it. I just finished adding the option to change the scale of your buffs and debuffs within the operation, party, player, and target frames. This change has recently entered testing, so look forward to it in a future Game Update!
This sounds promising :3 though I don't expect it to be in before Makeb drops live.