on the other hand, circle, if there were 2-3 builders helping you to "repair" the reactor, then it will spawn much faster than the current 30 seconds.
The concept is taken from gloom, where you have to "put" the buildable and then "repair" it to make it spawn.
Personally, the only thing I would suggest, is to make the buildable "de-spawn" when you build it in the new place. So you will have 2 buildings, one loosing health, another gaining it. Will create at least some kind of illusion of a proper de-spawn.