Difficult to tell...several factors come into play:
(1) Specifically how many more E190's and A320 are they getting. The E190 number in particular may be increased based on more USAirways birds coming. If that is true...then Republic can't announce that until US is ready to do the same. It affects USAirways employees if more E190 leave..
(2) The last Q400's are to be gone by September, which means there's still time for unannounced fleet moves to happen.
(3) Seasonal reductions ending in April free up more capacity.
(4) There is some slack in the current schedule at Midwest which can be used to squeeze out another flight or two.
(5) I'm not aware how much A318/A319/A320 slack they have today, but there may be some.
Finally, I believe the white-tail E170's which were rotated into Milwaukee (some birds coming from Hawaii) to cover for the pulled 717's are not all accounted for yet.