Will the Revolutionary Army Permit Exiles to Hold Office in a Post-Castro Government?

Not if history is any kind of teacher, specifically not if the RAF has learned the lessons of 1901, when the Americans took control of the Cuban government.

Consider this denouncement of appointments originating in Washington DC from The [Cuban] Society of Veterans of Independence:

“Only those having influence with Secretary Alger through Washington connections are able to secure appointments, and there are some of those who were not in Cuba during the War.” The practice “will eventually lead to trouble. Those who defended the country deserve recognition and will tire of consistently being ignored.”

by 'trouble,' the writer predicts Fidel Castro.

But shoot, even the American governors on the island were trying to tell Washington to cool it. Among others, Major Booker:

“the most difficult matter is to harmonize several factions on the island” He continues, “A large proportion of the better educated Cubans refugeed in various lands during the rebellion; many of these self-appointed, perhaps, were agents of members of the so-called Cuban junta. Most of these have returned, and are eager for recognition. As they speak English they have more readily found employment and appointment at the hands of United States officers. The fact that they have been recognized, which I do not pretend was ill-advised, has created friction between them and the Cuban soldier.”

Louis A. Perez, Jr. Cuba between Empires 1878-1902, page 296.