I am sure that is some . but not sure if it is enough to affect things. Were there people waiting for Pandora to open and pushed back their vacations? I am sure.
But there are just as many going no matter one (me for example).
I am going in November of this year despite SWGE not opening yet, but since we haven't been since March. 2017, there will be PLENTY new for us - Pandora, Toy Story Land. So I opted to not "wait" for SWGE and
(NOTE: I am gambling (probably losing .. due to projected completion dates of SWGE) and getting an annual pass for Nov. 11, 2018 - Nov. 11, 2019 to experience the opening of TSL and MAYBE catching the opening of SWGE. Either way .. I am planning on 2-3 trips in that year potentially before SWGE opens.
(Just happens to work out .. the main reason getting an annual pass is to go on two 4-5 day trips before my daughter turns 3 and starts adding huge costs to the trips -- plus my sister's family is planning on going and we may meet them).