Hilarious when people say "If they do X, I am quitting WoW!!!" haha.
Did Kara a bunch when TBC first came out. Had lots of fun. Would not mind it at all if they brought it back as a 5 man heroic. As long as they change up some of the boss fights, remove or change some trash and make it 2 or 3 wings it could be a lot of fun. I loved the remade ZA/ZG (although ZA wasn't really remade, but ZG felt mostly like a new dungeon). Only thing I miss is doing my ZG solo runs every reset. Never did get that damn Zulian Tiger
Not sure why people get all cranky about old dungeons or raids being redone for current content. Deadmines and SFK are awesome as heroic. They changed most of it to the point it still feels like a new dungeon, but still kept the "feel" of it that made them awesome in the first place. I don't see it as lazy, but as a way to throw in some old school goodness with all the new content. Some of these old instances(especially old raids) rarely get seen, so it's great to me if they can throw them redone into the mix with other new stuff.
Now if only they would remake AQ20 as a 5 man or raid. Have always loved AQ and the whole feel of the instance. (yes I have a brain.)