We wouldn't be having this issue if all branded flying is done by pilots under one seniority list under same work rules and benefits. ie., all DAL flights are flown by DAL pilots with DAL seniority list under DAL work rules and payrates.
I have to give credit to SW Airlines for nor selling out scope to regionals. All Southwest flights are flown by SW pilots, as they should be.
FAA is in bed with the airline management so they are not going to change unless someone with power forces them to change. Just look at the way FAA is sitting on the crew duty and rest requirement rule change. Or the way politicians are trying to water down the minimum part 121 hiring std. They can't even agree on ATP and 1500 hour requirement for new hires.