Yeah, buried somewhere in the 386 pages of arguing are some numbers.
Assuming the ride is open 9-9, we're looking 10,800 guests/day can ride. (Assuming they actually hit 900/hr) Right now, thats 1/3rd of the Epcot audience. which is averaging 31381 guests/day. Assuming they get the 20% attendance bump thats been rumored/thrown around, looking at 37657 guests/day, an extra 6276 guests. Which would be there specifically for Frozen and take up 58% of capacity as it is.
Operationally, they're screwed... excitement notwithstanding.