Hello,
i have not played with your mod at the moment, but i find it unfortunate if you want to cut out the old prometheum things
so far as i see in the Factoripedia you do a whole own research (Aside from the research pots)
how about this integration :
make the oort cloud and far reach to sol stand alone, probably if you have other systems (like Dedia or Nexuz) to have also the far reach for your warp-drive. ( i honestly would love to have more complicated drive sections of spaceships with different needs for some targets )
If you manage to to keep the shattered planet (maybe somelike nearer as in vanilla) or some other compareable location, you can use this as trigger (reach target, or get a prometheum ...) to open up your planet (looking into the alignment of prometheum to find the location)
some reducing of prometheum on routes or planets is ok (probably with an option set, so that other which still need this will have thier needs), but i don't see how the old prometheum will influence your (but maybe there is a mechanic i am not aware at the moment)
if you rename yours to pure-prometheum-crystal (like in the icon) you have effectively cut off from the old.
Probably a recipe to produce your crystal from prometheum chunk, with a very high cost (energy / time / ingedients), so you can tweak the influence.
Have the old prometheum spoiling to something to enforce you own way of producing
