To remind, the Remants they know exactly how genetical manipulation works, iIrc when they meet Zaya first time the girls they were wondering about the age, and the girls told them that they are alterd. (open that someone corrects me)
I see that aswell as an intend to build up trust, and find new allies, at least that was the conversation with Maria, they are looking for the cure, and need "scouts" to find places of interest, they don't are looking for Metal or only as a 2nd priority,
this awekening was necesary, and also Marias innerconflict, the stage is open for the next act,
The MC did well, he raised their atractivity as Allies.
Oh one thing what i wanted to remark is that the MC told Maria to give him the liquid after his contact with "Legacy" because he was told so.
Try to see it from Annas perspective : They were betrayed and left to die, No more trade,why should she help them ? as she said "if you find metal by yourself for what do you need us ?" she know exactly if the Island people wanted to invade them she wouldn't stand a chance they are outnumberd.