I quickly ran through the Extended Cut DLC last night and it's pretty clear that the post-decision outro sequence has been modified and extended.
However, during the run up to this point (I loaded from a save just before flying the Normandy to Earth to start the assault) I noticed one fairly obvious addition:
The Evac of your two selected squad mates, thus ensuring they are on the Normandy as required by the original endings.
I'm wondering if I missed any others, so, what are all the changes made to the game that happen before the start of the outro sequence?