Skywest is the only real option in the regionals.
Envoy will view you as a piece of meat and not as a person. Skywest will treat you with respect.
Flows are designed to keep those who are senior and about to leave in their current position at the regional an extra year or 2. Flows are a way to pay people without it costing any money. Flows have been around for 30 years and usually end before the actual flow occurs. In 1987 there was the Pan Am Express flow that ended when it was sold to TWA. A few guys flowed but they all could have gone to a major at the time anyway.
How long did the eagle guys sit before they flowed?
I would steer clear of any regional besides Skywest. I expect most future contracts to go to Skywest. Delta, United, American, and Alaska all seem to be sending their flying there and very little anywhere else right now.