I don't know what you can do at this point, Changes should have been made months ago if any, that doesn't mean some changes can't be made. There is allot of TIME, that went into the gamma base, not just NIC. I can't see how this reimbursement would work effectively, without causing even more drama with the people that spent so much time to build them.
Things that would have made a difference from the begining;
Limit connected structures to a network, you can even go as far as how many specific type of structures with these limitations. Limit the range of structures in which a structure can be connected to the network, based on how far it is from the terminal.
ammo and fuel are good suggestions but should have been in the original design.
Only thing I can think of would be to turn the gamma island into non-pvp and treat them as play housing islands. Also give outpost owns the ability to allow or deny people from entering there outpost area of influence, so people can plant there crops unmolested. This will also encourage people to make trade hubs and drive the market. Then come up with something along those lines to make it work and create new Delta islands to address the pvp and conflict issue. Then I can see the reimbursement of the useless teleport outposts.
then you can even take out a couple non inhabited gamma islands island to shrink the footprint.
text was modified as I thought about it more.