Interesting question.. I think it would depend quite much from the political attitude and views of a Clansman. Some Clans have a more liberal mindset and some are more traditionalists.
So many Clansmen would be blind to civilians' combat value or at least not approve their fighting (after all, they would see them as inferior castes trying to be warriors). You can see a similar situation in the 2nd book of the Jade Phoenix trilogy (IIRC) when Jade Falcon forces have to deal with a civilian rebellion on a controlled planet.
Other Clans might want to make them warriors, or at least give them a chance. At least, the Wolves might do it since under Ulric Kerensky and Phelan Kell's leaderships they got a better knowdledge of the Inner Sphere; These Khans (and Khan Natasha Kerensky) knew that the Spheroids are not worthless barbarians.