Thanks!
Just to close the loop on this, the trip went fairly smoothly. After arriving at PVG, we took the Maglev to Longyang station, then the Line 2 MRT to Jing'An Temple station, followed by a very short walk to our hotel.
The next morning we took a taxi from the hotel to Longyang station, then the Maglev back to PVG airport. The taxi only cost CNY 49.