The answer to the question is yes. That's how everyone is entering today, the LC side is the only exit then. The early hour ppl enter thru LC side but that's shut off right at 8:45-9 to become the exit. Yesterday morning what I heard was that the line they formed for the hotel guests went through Seuss, etc so they entered the "real" way but (at least one of) the regular, huge GP lines came thru the back.
In regards to last night - idk, like I said, I was there at 11:30 and ppl were still shopping. My guess is they closed the shops at 10:20 like they do the ride lines to get ppl to exit but reopened when most everyone was out and then those leaving from FJ could shop on the way out.