OK, Moore was one of those projects from Jerry Jones. When McCarthy was hired, one condition was to keep Moore. Jones saw Moore as a talented play caller, but also as a good leader that will turn into a good head coach once he got experience. But he left Dallas as a scape goat of the failures of the team during the postseason.
I think flying to Philly is quite telling. But to be honest, I am not sure if Moore will be interested to take the job. He has to decide which situation is better, to stay in Philly with that offense and take the job he may want (as we saw with Ben Johnson) or sign to a rebuild project with limited resources with the saints.