1. Hostility coloring is currently the only way to know if a mob is tapped or not, it would be nice if you could make Tapped coloring a separate option, even nicer would be if you could make an option to let this affect the border instead of the actual bars.
2. Castbars currently have a fixed background even when there is nothing being cast,
CastBar_BG should be hidden when CastBar is.
3. There is currently no way to set the colors for the XP bars, would be nice.
4. Ability timers, I know this has been requested but it would be perfect in compation with castbars. Since there's already some code that fires a candybar it should be fairly simple?
Improvement - Any chance you can have your own unit frame do the following:
Out of Combat (& fully healed) : Fade out/Hide
Out of Combat (& healing) : Go about 50% opacity
On Agro/In Combat : Full opacity
This is one thing I did like about HUDs in you could set it to fade out while healing and then hide completely when at full health and out of combat. It really cleans up the screen when your not needing to see your own information.
I think the request is for the the bars to transition to full opacity when aggro/combat begins, not during combat. My understanding is thatPLAYER_REGEN_DISABLED and PLAYER_REGEN_ENABLED fire before and after frames get locked down, and you could have alpha changes triggered at those events.
I'm neither fer it nor agin it, but mebbe (from my limited .lua twiddling) it could be done.