I hope they come up with a planetary terraforming mechanic in some expansion. Kim Stanley Robinsons books should prove as an inspiration. Good old Sim Earth also showed how this could be done in 1990. Since Planet already can sustain life only nudges would be needed, supremcy would maybe prefer a colder, arid climate, while Purity would want to make it more earthlike, changing the chemical composition. Harmony would be opposed to terraforming and try to nudge it back to where i was at the beginning.
Or make terraforming an action the seeding ships do, before they land (this would not be compatible with existing BE lore and i don't actually consider it for BE), they would remain in orbit and redirect comets to Planet and change it greatly before they actually land.