I arrived last night from LHR and it's amazing how they have reworked the luggage/customs area. Luggage claim 2A and 2B now feed to one common customs area which then exits to a large atrium with shops and the new entrance to the station. It's now more obvious what will happen once they rebuild the luggage claim belts and end up with something more on the scale of OSL baggage hall.
Downside is that if you park at P3 the indoors route is not obvious and the signed route takes you outside, crossing several roads.