Chevron deference is thoroughly unconstitutional.
Chevron encouraged congress to write vague laws. “As the secretary shall direct” should be anathema in a Constitutional republic.
I agree in principal, but it's also very messy to legislate down to every little minutiae of detail.
It is going to be very difficult if not impossible in this day and age to put the Chevron Deference toothpaste back in that particular tube. The best we can hope for is to minimize the spillage on the countertop.