The removal of the old style carnival swings to upgrade to SkyScreamer took the ride from a 1-2 star to a 3 star ride in my opinion.
SkyScreamer is not quite as thrilling as a few other rides in the park, so it is hard to justify the four-star. However, one way that SkyScreamer could be given four stars is if you like the view that you get from the ride. The view is not drastically different from those that you get up the hill at Superman Tower of Power, but with SkyScreamer you constantly rotate around to get a full and complete view of the park and its surroundings.
*Not good for those that are scared of heights.