Mesa is understaffed in the 1900 due to the new CLT routes, plus they are bidding for every open EAS city. Air Midwest has put in a request to recall at least 90 pilots to the 1900 to staff CLT. If they get those EAS routes, it has been said that all pilots would probably be recalled and a newhire class might be needed. If I had to guess, I would say late summer or early fall for a possible new hire class.
Hope this helps,
BeechScrub