Where were the ships?
Lock made such a big deal about having every ship available for the defense of Zion. The captain that was with Niobe and Morpheus (Captain Roland?) also made a big deal about going back for one of the ships so that Zion could use it.
What was the point? These ships werent present at all in that final battle in the dock. Zion had known for days that the sentinels were approaching and they were fully prepared when they came through the ceiling with the drill. If they had no plans for using those ships, why did it matter?