I looked at the external (birds-eye) rendering of the new combined single terminal, and the question I have is: WHERE HAS THE PARKING GONE? For me, one of the huge benefits of LGA over JFK is that at LGA, I can park right next to the terminal. So, on the return, I can be in my car within 5 minutes of deplaning. Yes, it's expensive, but better than dealing with a shuttle or train at the end of a weekend trip when I'm trying to get home before a week of work.
Is all of the airport parking moving off-site? That would be a mistake. Hopefully it will be underground...