The park is a family park since almost 60 years. It's normal to build some thrill rides but the park is well known with it's dark rides and not there coasters. The theming, scenery and memory's that stay's within the Dutch people can not be blown away with just a simple coaster. They already are building 2 coasters now so why build another one within 2 years ? Thats stupid. Since i'm a dad myself i got more and more against thrill rides in a park like this. You can't describe the feeling of seeing your young daughter sitting in a ride like the Droomvlucht / Carnaval festival and watching the puppets. Believe me, that group is a larger visiting group then the thrill seekers. The park will never be like walibi or something near that. Sure, one day they will replace the Pyton but that is still some years away. Till then, i'm happy with a nice dark ride since these aren't build that much anymore.
Edit: Larrygator get's the whole point
When your younger you just hoping more on thrill but these don't fill there new vacation area called Bosrijk. In a few years these younger one's will understand how it works