Today’s demand for DHS/Epcot is unusually high - guests with stays starting earlier this week already went to AK and MK, so they are focusing on the new parks. It is also opening day, which always attracts locals and bloggers.
It is also our first view into what limited capacity really means. Since for most days demand is below capacity, it was impossible to tell how full WDW could get when filled to the new capacity.
Of course, shows being cancelled on DHS means there is nowhere for people to go but lines, but that was probably taken into account when establishing park capacity.
Disney is trying to get demand closer to capacity, with the new deals, more slots available for APs (and more discounts, and being able to book 3 days + reservations). Let’s see if they will accomplish this.