Honestly, even a quite long delay would be fine, like a week or two. This would still let the players enjoy the benefits without impacting hermitron and lower the load on the server, I suppose.
I liked that I could have a look around randomly on the map and seeing a cool build, and then going to visit to the sake of it. Personally I don't see heaps of point to building something beautiful on a server if you are only one that ever sees it. As for being afraid people will see an unfinished build, I don't any shame in that myself, all builds have to unfinished before they can be finished.
It was also nice to be able map stuff out easily, even if the terrain is out of date, just being able to see where you are is very useful.