More JumpShip manufactures are something I've always wanted to see, given how... strange it is that you've got Periphery States with no domestic production, no HPGs and no details on whether or not they've got a state-owned fleet at all. The Dark Ages has been pretty good on this, actually - the Outworlds Alliance and Magistracy of Canopus now have domestic JumpShip manufacturing again.
If some datacore made it possible for more Periphery states to have proper shipyards, though, it'd upset the balance of power significantly. Because if they're *not* starved for transport assets, they've got no reason to just start colonizing the empty space beyond their borders - given a few centuries of this, there wouldn't really be a less sophisticated Periphery surrouding a richer Inner Sphere, and more a ring of rich civilizations surrounding an has-been, impoverished warzone.