Realistically people who pick up Gunbreaker and the new healer will get probably forced into lower dungeons if they do the roulettes anyways. The advantage of starting tanks, btw, at lower dungeons is that they have less in their kit so the focus is actually doing the crux of tanking...which is tanking. Making sure you manage aggro, manage cooldowns, and positioning the boss. Higher you go, more complex it will get.

In any case, people just better brace themselves cause youre giong to have a lot of new gunbreaker tanks running around and probably being meh at tanking right. But Ill do my part for all you worried folks and stick with DRK for a time so youll have some chance of having a good tank!!!!1! (jk)