I've been wondering the same thing. Republic and Shuttle pilots are on the same seniority list, but if RAH were to remove all of the 145s, and all of those pilots move into the 170, I would assume that would be a nightmare for someone getting hired right now. As for the Qs, that really shouldn't make a huge difference since there are only 5 still operating.

Currently, the most junior captain on the Republic side is an April 2011 hire.