You won't believe how awesome blizzard default UI feels after you uninstall all the stuff. You don't really need anything except prat. I've been using shitloads of addons including bagnon, bartender, sexymap, discord unit frames, recount, gladius, omnicc, tidyplates, quartz and similar stuff on my rogue during WotLK. I couldn't be bothered to download them all after reinstalling windows and just swapped back to blizzard UI only to realise that having many addons makes things much more complicated.
Speaking about healthbar status text, never had it enabled as well. It basically prevents you from seeing rough percentage of your HP. If you enable it, you usually won't have time to calculate anything