The new destroyer also has more advanced fire control. I don't think that it would be practical to refit the Odysseus class to the Hermes, so calling it by a similar class name would be inappropriate.
The practical reasons for a Jump Gate Network to Thebes are that it allows the Commonwealth to _defend_ Thebes, and to colonize it more efficiently. And to get real time communications with the colony.
I agree that shipping Automated Mines from Thebes to Plataea looks more practical. Take manned mines from Earth, exchange them for Automated Mines, then on to Plataea. Then shuttle back and forth between Plataea and Thebes until enough Automated Mines have been emplaced to meet Mercassium needs. Keeping in mind that some Mercassium is being stockpiled at Acheron, and Gitanyow could trade more.
Um. That comes to about 40 mines, with a +20% governor, to get 800 tons from A-II Moon 12, or about 50 mines to get that from moon 5.
This seems like a good time to divert freighters from shipping manned mines to Thebes, while still shipping population to it.
I may be overestimated Mercassium needs.
After developing Magneto-plasma drive, and probably power boost 10% and developing a magneto-plasma PB 10% drive, the Commonwealth will be busy refitting lots of ships with the new engines. That will reduce the need for Mercassium for new colony ships as it may be more efficient to upgrade the old colony ships, either by replacing the old engines or just adding more.
With the Jump Network to Thebes, it won't be necessary to convoy. Nor will it be necessary to keep colony ships under 100 HS anymore. And the jump network should be complete by the time the Commonwealth develops MP Drive +10% engines, or at least by the time ships with the new engine are refitted.
I must emphasize that without the Jump Network to Thebes there would be _huge_ inefficiencies associated with upgrading the engines on some ships but not others.
After developing the new engine, I would recommend developing Ceramic Composite Armor. There would be a moritorium on new construction with all the refits, and then you could start with new construction with Magneto Plasma drives and the improved armor from the start.