If, as a Captain, you manage to fly an aircraft to a critical low fuel state situation and you opted to continue to your destination instead of diverting to an alternate, then some serious questions needs to be raised about your Captain leadership ability! Under IFR, you must have enough fuel to fly to your destination (and alternate if applicable), PLUS 45 minutes. If you have not seriously considered diverting once you reach 45 mins fuel remaining situation, then it clearly speaks volumes of your decisions making skills or lack there of.
Secondly, in this SWA accident, the Captain never reported Min Fuel or Critical Fuel (which the latter would trigger an automatic emergency ATC handling).
Thirdly, if this was a low fuel situation as you described it (which facts do not support your theory), why take the controls at such a low altitude? Evidently the FO managed to fly and stabilized the aircraft, with precision and pose, all the way down to the point the Captain took controls of the aircraft. Therefore there is absolutely no sound justification for the Captain to assume control of the aircraft!