It would be interesting if they could somehow take the federation laws system and construct an internal governance system that had elements like "centralization" and fleet contribution - so, for example, spread out empires would need to have laws to keep things running efficiently that would effectively increase the "tax" they are paying in administrative overhead.Now we have ways to boost admin cap, but this has in effect turned the scaling penalty into what is basically a % tax to everyone. This very much favors high sprawl empires, since everyone is paying nearly the same % to not have penalties so more sprawl means more resources.
Having a certain % of the penalty always apply and/or limiting admin cap generation is needed for the penalty to be meaningful again.
Perhaps tied into a rework of sectors. But ultimately the idea would be a compact "merchant republic" might be running laws that allow it to be very efficient, while the "sprawling empire" has twice the size but is spending a lot of that margin on extra overhead to keep things together. It would be a good way to work in these "empire sprawl modifier" concepts and give a segue to stuff around actual internal politics, and makes room for feudal empires with vassal to make a return.
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