Speaking of the base UI, i've been using the default Raid UI recently for healing anything and it has been doing a decent job, but am i the only one that have some bugs with it? Like, i activated the "show class color", and sometimes when a new member join or when i join a new group, some of the people's health bar shows as a bright green color instead, and i have to go in the interface menu to fix this to the correct color.
But the most annoying one, which i mostly see in bgs or Tol Barads, is when people leave and new people join...sometimes new people are just invisible in the raid UI and the whole thing is fucked up, like clicking my health bar just dont select my character at all, and i have to reset the whole UI through the command /console reloadui. I hope Blizzard is aware of this and will fix it in 4.3.