I know much adieu was made about FP+ not being able to increase capacity in response to Rasolu's statement that it had, but this suggests to me that it can increase practical capacity (but not theoretical capacity).
Say, for example, that park-wide theoretical capacity is 30,000 guests (totally made up number--obviously wrong), a number that consists of attractions, queues, gift shops--basically everywhere that Disney will count as "occupied" by guests. Let's also say that 1,000 of that is for Living with the Land, an attraction that never fully utilized its theoretical capacity. This would thus reduce the park's practical capacity, because people weren't going there and it was not operating at <100% efficiency, so it was below its theoretical capacity.
I guess the question, then, is whether capacity during peak times (for phased closing purposes) is determined by practical or theoretical capacity?
Disclosure: I know very little about statistics--just enough to be dangerous, so I could have missed something very basic. I'm also *not* defending FP+ as a legitimate means of "increasing" park capacity.