That's great that the shop you chose is making such good progress. At this pace there is no doubt your car will be finished before mine.
My first thought is to address all drain holes and add the drain holes others with more P-car knowledge have suggested in previous posts. Next I would inspect the undercarriage for any hidden rust pockets and its integrity. Make sure that all tabs, brackets and anything else is there and the way you want it. It's easy to overlook the detail and later have to do some grinding and welding after paint.
I would have a serious discussion with your body shop professional about hidden areas and rust proofing or paint or whatever is appropriate to keep you car from rusting later on. It really is sad to see a beautifully painted car have rust poke through in a year or two after the "restoration".
Another thing to check for is damage. It's not unusual for low sports cars to have undercarriage damage from running over something. Perfect on top, dented on the bottom.
I'm only about half hour from your body shop. I would be happy to meet you there during one of your visits to meet and chat a bit.