I'm afraid I have to respectfully disagree.

One of the things which makes this content challenging is the fact that if you do die, you need to start from at least floor 51 again.

Without that fear of death and starting over from 51, people will be less careful and the thrill / adrenaline rush will disappear.
The rewards for getting past 150, and to 200, are supposed to be challenging to get.

I believe it is fine the way it is for this reason. I sincerely hope they do not nerf content which was just recently released.