First and foremost, I would like to thank you very much for giving us buff and debuff indicators. I do have a couple suggestions for improvement of this feature.
At minimum, please give us an option to display only self-applied self-buffs and an option to display only self-applied debuffs on target. Currently the display for self-buff includes all buff on myself including those applied by others. This is ok in small or less coordinated groups, but in a well-coordinated large group setting (like a relatively tight vet trial posse) this can flood the bottom and top of our screen with tiny happy boxes. I've seen it go 2 to 3 rows deep in a good group making it virtually unusable in large or well-coordinated groups.
Even in small groups or just running solo, the buff and debuff indicators seem to have too much information and can get overwhelming because it is not organized in a way that fits well with pre-existing HUD features. Ideally, what I would very much like to see are indicators of duration that countdown just above abilities and ultimates that have a duration listed in their sheet value. Below is an example of how I would like to see duration counters displayed that I generated by photoshopping a screenshot of my ability bar.

Many abilites have other effects that do not persist for the entire duration of the cast, but I would still find it much easier to track these secondary effects with a single simple countdown. For example, aggressive warhorn has a 30 second duration and applies major force for the first 8 seconds. It's relatively easy to see that after it countdowns below 22 seconds that the major force from that cast has worn off.
This system of duration count would not be able to include buff or debuffs that proc from things other than abilities, but I already appreciate the games existing visual and audio cues for most other proc'd effects.
Thanks again for making this helpful feature and I appreciate your consideration.
P.S. Big thanks for fixing our percentage based executes this last patch!