For anyone who's noticed that companions aren't showing the "Assign" or "Move" command while in workshop mode. It's a simple bat file with the necessary console commands that should reset the AI's values so that they can once again be commanded to work stations or moved to another settlement.

Download and place in your Fallout 4 directory.

HOW TO USE:
Select the NPC that's having the issue, it's ID should show at the top of the console window.
Type "bat followfix"
Quick Travel away from the settlement (I've noticed that it has to be a bit of a distance so that it forces the cell to reload?) 
When you QT back, your companion should be fixed. 

This has been around for about a month and a half or so. This is a compiled bat file of the commands so that you don't have to enter each one in manually.

EDIT: So far I haven't had any issues in my game with the companions resetting, however, that doesn't mean that there aren't any. If ya'll come across anything that seems like it's a result of setting a companion so it can be used with the workshop system, shout out on the discussion page for this so I can go code diving to see what else I can find.