BringUpTheBird- the toxic work environment is self induced because that is what you choose to focus on and choose to live. Fact is that, as a third list pilot, I have not been subjected to a sour or toxic work environment, from either side, in any way. Every pilot I have met and had the privilege of working with has been nothing short of professional, courteous, and friendly. As someone new to the mainline game and on the East vs. West sideline, the job here has been a breath of fresh air. My prior experience was as a captain at one of the better regional carriers. I'd make the same move again in an instant!
As far as the pay parity with DAL and UAL goes, it's coming. Honestly, I think the money lost in the first year is made up with quick gains in seniority, as time passes. The retirements are aggressive here. From what I see and know, the movement here is quicker than at any other airline, as we have a heavily front loaded seniority list- this was our lightest retirement year and things are already frantic.
The longer Parker waits for pay parity, the more expensive it will be for him. I'm not interested in giving up scope for $. I'll take both later, and that opportunity IS coming.
Best advise I have is make the move and don't look back. Don't take the advise of a "Burn Out", but rather, get your advise from a recent new hire with a much broader picture of what is happening. This is going to be a great airline, and the application process isn't a quick one. The longer you take to apply, the more you will be kicking yourself later for not applying sooner.