RCDs are not working.
While it's nice that they have their own little menu that is fast to navigate through, it seems that whatever made this change made it so that they do not work at all, be it borg-RCD or regular Engineering RCD.
Good news is that the ones with menus to begin with (RPDs, Tile painters, Matter Synths, etc.) do still work.
How to reproduce this problem
Pick up an RCD, or become an engiborg for that built-in RCD.
Click it to bring up the new menu, press any of the options.
Press 1 tile around you.
Find that nothing is being made.
What you expected to happen
Something to be constructed or deconstructed in a rapid manner
What happened
Bugger all