Dying at that boss respawned me at the beginning of the area all the time (at least in my playthrough) getting 1 shotted everytime made this area annoying as hell, checkpoint at boss doesnt work. so you constantly have to fight through 80% of the mobs again.
Have to say, this was before the patch, didnt try it again after.

But, the fact that everytime you die all the mobs reset, is one of the worst ideas ever.