From what I recall this seat is a lot like PA-06 or a reverse PA-12. The slightly Democratic PVI hides the fact that it is highly Republican locally and there is little to no Democratic party. The same pretty much applies to MI-7. Hence the Democrats massively underperformed Obama in both in 2008, even without a wave, 7 and 9 would be hard to hold with a blowout at the top of the ticket.
Correct; this is a very affluent area. Overwhelmingly white collar workforce, over 40% with degrees (if I'm remembering right), high rates of managerial and professional occupations, 80% white and no serious pockets of poverty.