I love this ui and all the work you have put into it (blood sweat and maybe a little tears?)
From a healers stand point i would like to suggest 2 additions
1. a sort of range finder to the raid/party frames so i can see with just a glance at who is in range for my farthest heal and who isn't (make the players frame fade out a little bit for those who are out of range) This is a life saver for me both in battlegrounds and in raids (i play a resto shaman)
2. Color the players frame with what they are afflicted with (per class, example: shaman can cleanse poison and diseases so green or yellow/orange when they are afflicted by it) It helps just as much as a range finder to quickly see they are afflicted with said debuff instead of remembering what the icon looks like when they have a rogue bending them over the armory
You in no way shape or form need to add these features, god you have got to be sick of playing with this one addon by now
if anything i would rather see it put in (if it was at all) for Wotlk ready version of nUI (because i just want my greedy little hands on the new version all ready
)