The size of this map makes game play on it stuttery at best. Unplayable at its worst. Thus you could reduce the size of the map by removing the final objective.
Why the last objective? If teams are balanced in a game of stopwatch, the games in my experience tend to focus solely on the first and second objectives. Thus why have a portion of a map that is only used when the teams are skewed in player skill.
AS for what should be done with the removed part, it could be turned into some new Excecution map, or perhaps you could just add a portion where attackers need to board the airship to steal it. Call this map Airship. You know, you destroy the anti-aircraft control center, and then it is a dash to inside to destroy whatever is holding the airship down. A map that starts in grime and mud and has that clinically clean ending.
