Personally, seperating the F/A's and Pilots would be an operational nightmare. On the AWA side it may work because of the operating envirnoment you are in. Wait until you experience PHL, LGA, BOS and DCA on an irregular ops day.
Just as an example: The other day, operations in PHL were going along pretty well. Suddenly the winds from Wilma crept closer and the ceiling dropped. We went from a near perfect operation to 3 hour arrival delays. It started with a ground stop as a couple flights missed approach. Suddenly airborn inventory was more then the airport could handle and holding commenced. With just a change in the wind spped and direction, PHL went to 3 hour arrival delays, 30-45 minute enroute holding and had 3 diversions. Keeping crews together helps reduce delays and spill over. For each diversion, there could have been 2 additional flights delayed awaiting crews from the diverted flights. So you go from 3 delayd flights to 9. Now look at the enroute holding. Flights taking an additional 30-45 minutes due to enroute holding compounds those numbers even further.
some would argue that those scenarios only play out during irregular ops, my retort is always, irregular ops is the norm in PHL.
Some of our partners on the West will have a very rude awakening when they see what happens on the east side. Just another example, with hurricane Wilma, US East canceled 140 flights on Mon and 147 on Tues due to the hurricane/airport closures. US west canceled what? 10 flights each day? US West has 3 flights to FLL, 2 to MIA, 0 to PBI and 0 to RSW. All of those cancellations are strictly mainline flights and did not take into account express. On Tuesday we canceled 56 flights due to the ATC programs and weather in PHL (associated with Wilma).
Can you see where seperating the crews would just compound problems and make operating that much more challenging?