I agree, it annoys the living cr@p out of me. I had a beautiful streamlined two hand workflow all sussed out, and the revised X button function in Develop ruined it. It wouldn't be so awful, but Crop Mode also hides the furshlugginer Reject Button icon on the Tool Bar as well.
There's enough context switching going on already, without having to R-X-R, every time. Faster, more efficient way, anyone?
(PS Ignore this if you've heard me whinge before

, I shoot a high-speed action sport, and many, many of my shots require a framing/cropping tweak, so I just literally live in Crop Mode in Develop. Everything else I need works fine in Crop except the darned Reject)