Welcome to the forum and congratulations on your "new" purchase. We have an '08 Cougar which is pretty much identical to yours except for the floor plan. Before you drive it away from the dealer's lot, you should obtain a PDI checklist from this forum. One of our members, Flyguy, has one and you can go to his website and download it and take it with you when you do your final walk through. (see note below) Make sure everything works to your satisfaction -- everything!
The small tears in the roof membrane should be repaired asap. You might try to find out how long they have been like that and double check for soft spots, bulges, dampness, etc. all along the entire wall. Water can find its way in - even in those small tears and travel to all sorts of places away from those tears.
(Note: Flguy's webpage: http://www.eaa1358.com/Passport
. Scroll down and click on Pre-Delivery Inspection Checklist.
PS If you have any further questions or comments, please post them in a more appropriate category now that you have checked yourself in.