To put it all into one word: Excellent! :D
Regarding the "Move to beacon" command: I frequently set my bots to move to a specific location when their actual work process is completed - i.e. when the storage they are monitoring runs full and they stop their work. A "Move to beacon" command would allow three scenarios to play out:
1) When a bot completes its work it moves out of the way indicating visually to me that this particular process is in idle mode and it thus also makes it easier to locate the bot in the world since they are all gathered around the beacon.
2) When moving my build beacon all my builder bots that are currently idling because no build projects are active, would move to the new beacon location so they are already at location when I start throwing down blueprints. I usually grab the beacon and set my player character to move to the new location, then through the build menu I start moving their source storage boxes to the new location. With a "Move to beacon" instruction, I would simply stop/start my bots and have them move there instead of having to wait for them to catch up once the first blueprint has been put down.
3) Migrating bots that move over great distances could be made to travel specific routes by applying multiple "Move to beacon" instructions which would make laying out stone paths as roads easier to handle. A recharge bot could then also be placed at each of these route beacons to make sure the traveling bots don't run out of juice mid-route.
This suggestion also sprung to mind just now:
Allow those "buildings" that don't require flooring to be placed on flooring, like the storage boxes can. I'm currently reorganizing all my stuff and creating buildings to put things into, but I have to leave the "floor" of the building empty for things like the porridge pot etc. because they wont go on flooring.
Thank you for hint about the Z key. I completely forgot about that one!