A bunch of thoughts on the updated plans and discussions:
1) 16k parking spaces would be ridiculous and won't fit. It's probably ~6k.
2) I'm still thinking it's a hotel on the backside of the park. On a document like this, public vs private roadway refers to ownership and maintenance responsibility, not access. Similar labels and references to public right-of-way boundaries can also be seen on some entrances/exits of the main parking lot. It might be similar to how Portofino Bay has a really long entrance road which is privately owned but open for the public to drive on. Additionally, there would be no reason to put a 4 lane road in that location if there wasn't going to be a hotel there.
3) The bus area in the parking lot seems somewhat odd because buses coming down the dedicated lines from the current resort won't be able to get there, so there will probably have to be another area for them closer to the park.
4) The Kidzone Nintendo plans now fit even better in the first "land" area to the left of the entrance.
5) The changes in the northeast corner of the park seem really odd and hard to explain without more information.
6) These plans look much more "real" than the last ones in that these seem detailed enough to believe that they could reasonably get approved and that Universal actually wants them to be approved. The high level of detail provided and numerous small alignment shifts from the prior plans also suggest that they have made good progress in locking down the design of the new park, and hopefully will be ready to submit development plans for it in the somewhat near future.