Wouldn't disagree with you on the points you make
1 Lexy and Pete, really great people but haven't got the same net work of friends that Anna and Alex once had.
2 May me they don't live in the same city as the others. But you think Em & Sia would have some fun together once and a while or is Bob the jealous sort. Strange as that what got them together in the first place.
3 Perhaps Anna and Alex were waiting to see if there was any milage in apartment. You would think in all the apartments they have close down there would be some spare camera's hanging around