Airbus, quick upgrade, fewer legs a day, better qol than a regional. Possibility of pay raise during your stint while waiting for the chance at a AA/UA/DL/SWA? Working for frontier seems like a no brainer verses going to a regional, especially if you have very little total time. Then, if the money in the new contract is close enough to aforementioned you can stay and have great seniority. Pretty sure you would make the exact same choice as them and choose frontier.