I'm paying attention to this since it definitely affects me. My friend at Spirit says his take home is about 72% of gross, but he's filing married and I'm not sure if that includes perdiem (which we all know is tax free on overnight pairings).
Even with the new contract Spirit will be a little bit of a pay cut coming from regional FO just because of not crediting as many hours. I frequently credit over 100 at Xjet but am told that's rare at Spirit and impossible on reserve.
At Xjet, my take home is about 69% of gross filing unmarried, including perdiem and ALL deductions.