There are enormous differences between what could be commuter friendly and what commuters at SY are having to deal with. I'm not a commuter, so this is mainly just a repetition of what others have said, but having a mix of day turns and trips is not helpful. Having two days off between trip and getting worked until after the last flight out is gone is not helpful. Inability to effectively trade, manipulate, or improve schedules is not helpful. Lines that start at 94:55 credit with a bad trip rig is not helpful. Others could say a lot more, but those are just some of the issues that mean we still haven't turned the corner when it comes to attracting and keeping commuters.
We are currently staffed by locals and commuters who have enough seniority that it's pretty tough to walk away. When I fly with a first year FO who commutes I just assume I won't fly with the guy again before he gets another offer and leaves. And why not? If you are not local and don't have high seniority, why would you turn down an offer from a legacy and stay SY?