But X-COM has completed its objective, and thus it doesn't have a purpose anymore. The aliens are gone. People don't know if they'll be back or not, but for the moment, there's no real need for X-COM to have full independence anymore. The world is going back the way it was, without an overall threat to unify humanity, we're back to politics and petty bullshit between countries. X-COM is going to be pulled on from every side, and an independent X-COM isn't going to be what the world wants anymore.