I think the biggest reason for that is that it's an entirely new concept. There are no other WindSeekers besides those under construction, and I don't think there are any similar rides out there which people could compare this to. Sure, swing rides have been around for decades, but none like this. The only specs we have are those which have been given to us by the park and/or Mondial.
In addition, you have those people who have only heard that it's a swing ride, and haven't bothered to read all the details about it, so they simply based their opinion of the ride on their opinion of swing rides in general.