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!
Any chance there's a way of visually differentiating the HoTs and DoTs you've cast on the target frame (or in the raid frame) , like making them larger, different background, underline... something?
Even just physically separating buffs from debuffs (as they are on the target frame) on the raid frame would be ideal.
Raid healer here hoping for more.