The policy I was kinda hoping LFL would take is to just "ignore" whatever's happened since RotJ. That is, don't bring it up, but don't directly contradict it either.*

I haven't closely followed the EU, but the mere fact that Han, Luke and Leia are still alive after 40 years seemed reason enough to keep Episode VII within the existing continuity. I guess the problem would be forcing Abrams and Kasdan to suddenly step into the EU "as is," whereas I'm sure they had their own idea for Episode VII independant of where the EU has taken things.

*Which, for all we know, could still be what they're doing. Chee and Hidalgo might've had a meeting with the new people, sat them down and said "this is where things currently sit, Chewie's dead, Ackbar, Mon Mothma and Crix Madine are dead, two of the three Solo children are dead and the surviving one has a husband and kid, Luke's son is now in his late teens but the wife Luke had him by is now dead, etc, etc." A meeting like this could have happened for all we know, and for all we know the new people found all of this interesting, a cool place to jump off from .... or they said "screw it, we're starting over from scratch."