Question 1: Do you think that it is missing a third anchor ride or just the land itself?
Question2: On Flight of Passage, do they use the fourth theater to handle FP+ guests and the other three for standby (like Soarin')?
The way it loads, FoP seems to use the lower level mostly for FP+ guests because their line leads to it.
So 1/3 of the capacity or so. The way it seems to work is that both the up ramp (levels 2 and 3) and down ramp (level 1) have 2 lines and 2 groupers putting guests into groups for the preshows. Essentially the lanes on the far walls of the ramp up or down.
The grouper for chambers A and B pull from the left line whereas the groupers for C and D pull from the right line.
On the 2/3 level, it's moving twice as fast because they're loading A2, A3 together as the lower level just loads A1, then B2 and B3 open and wait or immediately load depending on the speed of the grouper and line, B1 doing so down below as well. C/D are doing the same - each preshow opening as various timing delays and such move them around a bit, but they seem to stick to one ramp line per A/B/C/D theater.
The groupers will move people around in these lines to set things up so people just walk in order into the preshow, but I've also seen them put people in orer in the adjacent lane as prep as well as dividing them off into A or B if both open at the same time by sort of winging it to fill the spots. Party of 2 go in A1, party of 3 into A2, etc..
The pulse/merge positions (could be grouper - all these names I'm just generally assigning based on other attractions) are sending people in groups to backfill these lanes. They can obviously put anyone from standby or FP into any given lane - it's only 5-10mins max from that point before you're in a preshow.
They probably keep an eye on FP and will hold standby as needed, but typically it seems Level 1 caters to FP while the standby line keeps moving by using Level 2 and 3.