Hi Bjarki,
I agree with your assessment, there is no feature in Maintenix that allows for all in work work packages to be rescheduled to a new location. This is especially important if there are part requests in your work package. If only one work package was started at one time, then it would be possible to reschedule the one work package to a new location, to ensure that newly picked parts are sent to the correct physical location. In your scenario there is risk that without double-checking the tail the parts will be delivered to the wrong bay.
This is a good candidate for an Idea. Can you please raise your suggestion there? If you have counterparts in other organizations that you can encourage to vote for your idea, this would raise the visibility of the need.