I am 100 percent sure that summer gets few visitors, I know the company very well. I have seen huge amount of booking of tickets and the hotel for up coming winter. It's normal to get few visitors in the summer.
Regarding Six Flags, they secured the budget and they are starting soon. They approved a number of rides in Six Flags. We all know who is behind this project so do not worry. Six Flags is opening in 2020.