I want magic sites that have a wider variety of special effects, nothing you'd design a nation around, but bonuses that could be modified by dominion strength, or the nation owner. Eg) An astral pool that grants gems based on the number of mages reflecting on it, but if Ryleth or a blood nation conquer it they can taint the well causing a chance of insanity for anyone who scrys the province or uses a similar site power.
Nations with forge bonuses lose the forge discount in exchange for being able to customize items with the crafters paths, frostbrand->wind brand, etc just a elemental damage and gem shift.
Ability to configure commander/sacred mount status, summon larger shade dogs for Censors, dryad hoplites riding centaurs, let mindflayers ride sharks. Mainly for nations with size 1-2 commanders to use a mid game summon, animal with a dead rider, or a nation specific mount-ish unit, to strengthen a normal unit that may have gained a great Hero power, "upgrade" chaff commanders as midgame goes on, boost movement of a small squad, or insulate mages from assassination more (kraken mount?)