Not really that new - places around here have been subbing other things for the buns, or just offering a 'no-bun' option, for close to a decade now.
What you
really want is the KFC Double Down to come back.
Two fried boneless chicken breasts, with bacon, cheese, and sauce in the middle. Contains all the calories (and salt) you need for a
whole day. My usual order, when it was available, was two of these and a large Coke.
(On an entirely unrelated note, my doctor has put me on blood pressure medication. I'm not even sure why I'm mentioning that, really.)