Developing a modification plan for the Aurora Titan plan did not take as much time as he thought. Ves and Gloriana both borrowed substantially from the two variants developed by the design teams and refined the solutions from there. This saved them a considerable amount of time and allowed them to skip entire steps.
Another reason the redesign sped up was because Ves mainly aimed for easy gains and convenient modifications. The Shield of Samar needed to be upgraded quickly, so Ves tried to refrain from going overboard on the design and material aspects.
Replacing the power reactor with a vastly-upgraded one increased the mech's endurance and mobility, though not by a fantastic margin. What was much more interesting was that the Shield of Samar would get a lot more use out of its polarizing module, though its relative importance had dropped due to the mech's vastly-upgraded armor system.