Linking the resources of all airfeilds, GV parks, and CV's for each country to a handfull of stratigic points would be madness. That would place the fate of the game, and players "Fun Factor" in the hands of a minority to control. The very same suicide jabo's who used to be complained about would become insufferable.
Left to our own we do not form our 3 countries into military commands with several leaders coordinating attacks and defence against the 2 other countries. We don't logon and report for duty to do our part in a larger game plan. TOD will address such a scenario. Because most players are adhoc and fun factor oriented in our game play we will never be able to adequetly defend resources that place the survival of each country into one basket so to say.
The game would become a competition between small groups of attackers to game the game by suicideing to destroy the strategic sites before their counterparts in the other countrys. Once a whole country is down to 25% fuel, no ordinance, and no troops it becomes shooting fish in a barrel for the country(S) that still have effecitve resources. You start risking people logging and waiting for the reset. I'm makeing a worst case scenario here. Having a single choke points in a game lends itself to abuse, unless the games goal is the stratigy of manipulating and abusing that choke point<--TOD.
Other wise, making the available resources for each feild a local matter you keep up the fun factor while allowing the use of the games available mechanisms to let you take as many feilds as you can keep players interested. I thought missions were a way to do something for your country? Still that requires organizing players to perform set duties, kinda like herding cats.<---TOD.