-the umbral choir should have the ships be their crystallized gaseous body, in fact, all their constructions and weapons could be considered part of their organism.


-the hacking system should be renamed and retooled the "infiltration system", and depending on which race you pick, that system would change a little. some faction would steal resource, others ships, some could lockdown planets, etc.


-when you reacquire your infiltrated pop with the umbral choir, it should be considered an abduction, the way a see things, they infiltrate their hosts then when they leave, they consume the host.


-if the umbral would infiltrate all or the majority of your pop, they "seize" the planet making it impossible or harder to get rid of them, to balance this, the umbral could maybe only cap a certain amount of pop per turn.


-the umbral choir for a pacifist race doesn't allow you to be too much of a symbiotic player, they should be revamped, maybe via the questline to have either a parasitic or symbiotic playstyle.