Hello from a great hotel room in Osaka, Japan. Anyway, I hear what you are saying, and I think that is why the FAA is trying to change the rest and fatigue rules, to help guys like you who fly 6 legs a day or are tired at the end of each and every day. Someone is looking out for you. As far as corners being cut, you need to anonymously turn in that info to the FAA, and it will be fixed. Walk into to your local FISDO there in ATL (near the airport I believe) and raise your concerns. I bet they would want to hear from you. Also, when anyone buys a ticket online or a paper ticket, it states on the back or in small print who is flying you. If it is Comair, it will say it. Each airline has their own insurance, or can be covered by Delta insurance. The Comair crash in LEX paid out something close to $300 million dollars. That is a huge sum, and if that does happen again, expect even more RJs to be parked, because Delta can't monitor the training or create training programs for each RJ carrier, but they can for mainline. They monitor mainline's training closely. I am not saying "we are better than you", but some airlines out there have worse training, and that needs to be stopped. The reason this airline shuffles DCI carriers around is because of the Comair strike back in 2000. It cost Delta over $1 billion, and they have never forgotten that.
So, if more of your DCI planes crash, there will be less DCI planes out there the next day. IF a lawsuit ever comes to fruition that punishes a mainline carrier for a regional's crash, the days of regional feed ARE OVER. Insurance covers almost all of the liability, and unfortunately crashes don't stay in the minds of travellers all that long sometimes, unless they were involved or knew someone who was. (example---the Colgan crash victims and friends are pushing for the rest rule changes)
As far as me sleeping tonight, I will have a great sleep, because I know most pilots out there are professional, and that things are in motion to help change rest/fatigue rules for the better (or better than what we currently have). I would suggest throwing out a resume to the legacies or even SWA, and get away from the regional world as soon as possible. The benefits and choices are a lot better over here. Good luck to you.
Bye Bye--General Lee