Okay...let's move Southwest to DFW. But since Southwest doesn't fly internationally, let's exempt them from improvements to the international terminal. And since Southwest doesn't interline, there's no need for a skylink system to get them to another airlines terminal...so no need for them to foot the bill for that one either.
You know...Love was never intended to be closed. There were GA planes and corporate jets landing and taking off while folks were ice skating in the lobby of the terminal building. Try landing a GA plane at Stapleton. Hell...try ice skating at Stapleton. And since Love isn't closed, and since DFW has certainly reached "maturity", why not let Dallas be the big city it's always wanted to be and have a second airport?