Yes, the errata is extensive for the Foghoks, and MegaTraveller in general.
As published, the ship is missing thousands of tons of components, doesn't indicate how many Shuttles are carried, and a variety of other issues. Part of the fix by Clay Bush back in the day was to re-engineer the many broken ships of MT, and his corrected version is in the Errata document. One of those fixes was to increase the M-Drive.
MegaTraveller ships can be brought even closer to the performance available in CT HG by using a more detailed approach to endurance, which can reduce the fuel needs considerably for heavily armed or high G ships. TNE uses that approach more explicitly, so it shouldn't be a foreign idea to this list.