I see PHL, ORD, DFW, CLT, DCA, JFK, LAX, MIA and LGA staying strong and maybe even growing, I see probably some DCA slots having to be given up, I see PHX as the causality in this merger.
As the largest carrier at BOS, I see the new AA growing there as well.
My guess is that some adjustments are made at PHX, but that a bigger/stronger AA won't cede PHX to WN (which has its own issues right now that will keep it from growing at will - it ain't 1995 anymore).