I noticed that there will be heroic versions of SFK and Deadmines with the new expansion. That is awesome. I'm immune to complete instance burn-out; since I'm a dungeon-crawler at heart, I'm always game to do an old dungeon again, provided I haven't been running it twice a night for the last week and am fed up. I've been hoping they'd start remaking old instances with heroic versions, maintained at the current level cap. This doesn't completely fulfill that hope but it's a nice start!