From what I'm understanding, the only airline that currently places a high emphasis on grade point average is Delta. USAirways didn't seem to care about my GPA, when I interviewed. Hey, they didn't even ask to see my transcripts!
I honestly have no idea what Skinner is going to capable of, at the express level. Frankly, until pay comes up, there is nothing that improves.
If I was looking at a regional carrier to go to and build time, I think I would stay away from ANY carrier that is wholly owned by a major. This is because the mainline partner, IMHO, would be less likely to hire you away from their own ranks. Go to an independent carrier such that you have an equal shot at applying to all three major carriers without fear of retribution or discrimination.