Regarding the old system I'm still think, that propulsion systems should use H-Fuel as ingredients and switching from Gold to Silver for Superstructure might be best.
Why? Because both commodities are mineable by the houses with the component boni. It can be used to focus on border skirmishes and corporate wars. As stated before, High-Temperature alloy would already contain Niobium (see 2.) and is reachable by Kusari and Rheinland.
Regardless of that I'd like to raise a few points for your changes:
If the Liberty-Kusari conflicts progresses, Rheinland might be the lawful monopoly for Kusari to get Interior systems
It might be a good idea to give shipping corporations player bases the possibility to manufactor non-mineable HRC. They haven't necessarily to be an ingredients for the ship components. They could also be manufactored out of low-value commodities, so one can still outperform local npc prices (or you tweak the production).
It might be good to review the NPC buy-prices for ship components, as there are limited players and limited ships, the demand is not endless. If there are no new ships the production of components would be a waste
Add more ship recipes please. I understand you had to start at some point, but enabling the possibility to produce house capitals below npc prices would give options.
Are the diamonds of Interiors replaceable with Hessian tears? Otherwise unlawful factions might loose the ability to run their own component production.
In your proposed Superstructures recipe I see Molybdenum. Will Daumann get mining and refining boni for that commodity or will this still be GMS mining only?
As always, please consider these points as my opinion and suggestion as a player. It does not claim to represent the optimal solution.
