Sort of related to the 'capacity v income' thing, one stat I would love to have is how many onride photos are sold per 1000 riders. As in, aside from pure make your park better, intangible stuff, what is the tangible result to revenue when you increase capacity?
Also what would it do to revenue if the kiosks at the end of rivals, instead of showing you a video and scanning a barcode, that you then take across the park, queue up and then buy, what would it be if it was 'Buy a digital copy of your photo NOW, $10 Eftpos only, with a QR code in the email to get it printed in park for the remainder of the cost?
If the stats exist, surely you could make a decision outside of the intangible 'The queue is too long' and have a way of quantifying the return on increased capacity.