Was there any indication of the Blight 'burning itself out'? As a microbe, it existed in the groundwater- that much I remember. So unless the water evaporated and left the microbe nowhere to go- how would the blight be extinguished?
Indeed, Axen's people shouldn't be ruled out. Even if it meant cannibalizing every ship they could (if on the moon) to construct another exodus starship, then Axen would have done it.
It wouldn't stop them from mining the moon dry if they had to, either.
What I'm suggesting by the survival of a sol system colony is, that, after all the traveling done by the colonists of the Conestoga and the second survival ship (100+ years?) Sol system settlements would have had enough time to build up a civilization on another planet, and possibly start sending probes of their own.
This could mean that the New Terran Exodus ship could run into another colony mission from Earth, potentially.
:op2: