I keep bumping this thread but the Tank/3 Hunter/Healer team is still only ilvl 428-432, and was able to clear the entire dungeon in under an hour start to finish. Was able to tell because I popped a flask at the beginning and still had a duration on it at the end.
Now that time has gone on, I'm able to confirm this is a doable dungeon for mythic+.

All of the bosses I felt was able to down and still had a lot left in the tank. Most cooldowns were up.