Personally, even if I were the #1 guy on Frontier's list, I would rather be a bottom reserve FO at Southwest than a senior captain at Republic after this all shakes out.
Also with this whole talk of using the C-series as a "replacement" for the Airbuses, you can be sure Republic doesn't intend on keeping Frontier in their current form. Guarenteed Republic has one plan in mind, and that involves every pilot on property being paid RJ wages with RJ work rules.
Couple that with the fact that in 5 years, Southwest will still most likely exist. The same probably can't be said about Republic. With that said, I'd rather be furloughed from Southwest than the #1 guy on Republic's list right now.