Still fuzzy on some details, but here's a quick summary of how I think it works:
1: Main entrance which will probably be used as a queue to enter land.
2: Here's something interesting. Looking way back before the tunnel was covered, there was a division on the same side we see this extra entrance. For symmetry, the other side has one large opening flanked by two smaller ones, but I think the one on the left in the photo below actually leads to a smaller tunnel.
I speculate that this may be used as overflow queue for the Resistance ride and will take the line back out of the land. I've also speculated about an area behind muppets and the resistance queue that may also be used for overflow, but haven't seen enough to tell either way.
3: A-Wing?
4: Blue X-Wing photo/meet and greet?
5: Turret/Main Ride Entrance. Standby on left. Fastpass on right. (I'm not sure I have the fastpass path correct, may skew to the right of the rockwork. There were two openings/doorways in the wall there.
6: Stroller Parking? Disneyland has a similar area that doesn't seem to connect to the queue. This could also be used for overflow ride queue if they keep strollers out of the land entirely.
7: Cave entrance which will pass below waterfall.
8: Indoor queue- ruins.
9: Preshow/briefing rooms.
10: Resistance hangar/hideout. This is where we'll see Poe's X-Wing as we board the blue shuttle.
11: First Order Star Destroyer Hanger.
12: Ride Exit.
13: Saviaeson Salvage (gift shop.) This may have it's own exit/entrance from the land.
If I have time, I may put together a better version of this. Some of this I figured out myself well over a year ago, and much was figured out by others on this site (BrianLo and Britain especially). All of it was done with the subtle and not so subtle hints from Martin and the great aerials provided by this site and Bioreconstruct.
Thoughts?