Perhaps it's an in-advertant side effect from one of the other changes they've made and they don't realise it.
I think this is the main reason for all the new bugs that appear. They change one thing, but that has a knock-on affect that changes another five things,..usually for the worst.
I think that is possible, but it seems odd that they just inadvertantly changed the key selections. Losing the ability to edit the Editor IDs like I just described above would strike me as a more likely candidate for an inadvertant bug. However, I think it is more likely that these changes were deemed desirable features by a senior Beth employee who thought it made the CK better somehow. I actually like the change to the c and y keys and the addition of the widgets showing you which direction things are going to move in. I have pretty good directional sense but in some spaces it is hard to remember x and y coords.
I did occaisonally click on the Cell View for something and move back to the Render Window but forget to click there and hold down the spacebar and inadvertently over write the Editor ID of an item selected in the Cell View. I was used to catching that and hitting Esc. I bet that irritated a Beth CK user who doesn't modify Editor IDs and they changed the default. I just hope there is a setting that will let me enable that again and somebody at Beth will choose to share that with us someday.