If you build with people, nothing will get done.
Usually, the build server is relatively dead. Getting more people onto the server is a plus.
I think what we need as a server is a person telling us builders what to do. Most of us know what needs to be done, but doesn't attempt to finish any job. I believe we need a person that will assign a job to each person and be online themselves as often as they can. No side projects, nothing unnecessary, just what is needed to finish a region well. It seems there is interest in building Kalos/ORAS between many people. I suggest we have a way for a current builder to become a 6-gen builder by building their region specified by the person in charge and as exceptional as it could be. If then a Head Builder or the "head honcho" likes the work they have completed and assigned to do, they will get a chance/spot to become a 6-gen builder. Also, yes, two regions are complete fully, this doesn't mean that their builders should be immobile. I'm sure some of them have the game somehow (roms, hand-help copy, ebay), and if not give them a job that is able to be done without a game (terraforming, trees, rocks ect.)
The major point I am trying to get at, even if you disagree with the whole 6-gen builder idea, is to have
leaders with a purpose of getting something done well and by a deadline. For that to happen, an incentive is necessary (not just a feel-satisfactory-because-you-built-a-region incentive). I suggested a way to become a 6-gen builder something that quite a lot of people would enjoy starting. Perhaps an incentive is to create an easter egg (arena, shirine, other). Possibly even a way to own a house inside a 3D-Pokemon when we update through to 5 regions. Finally, a leader that will drive their builders towards the one goal we want as a community will be necesary. I say we get a stronger "government" or in other words a leader telling us what to do. I bet you have never heard of a strong country without a strong government. We need that government in our server, and not just for the PvP server, but the Build Server as well.