Let me say that over the past several months learning and using PF3, I've found it to be vastly more flexible and superior to the other options I have tried. Perhaps the biggest shortcoming, however, that I have seen is the lack of en-route hand offs/frequency changes when flying within the same Center. For instance, I do a lot of flights between the northeastern USA and Florida, and with the other products I have used (particularly the default ATC and VoxATC), you will encounter several several frequency changes along the way, sometimes every couple of minutes, particularly in this case within Washington and Jacksonville Centers. While I am of course ignorant to the intricacies involved, would it be possible to have PF3 read the default ATC boundaries or use what is provided with fsAeroData, etc.? It seems as though these other products have been able to pull this data in.
Another minor issue is the ATC boundaries don't always follow their real-world boundaries. For instance, I was once flying cross-country from the US west coast to the east coast with a flight plan that clipped Toronto Center near Detroit (I forget the waypoints, but it was something like DXO - KEEHO) and I was never handed off from Cleveland Center.
Thanks!