But most of those rides were to fill out a recently built park. Pirates, Space Mtn, and Big Thunder for MK, JII and Horizons, Living Seas for Epcot, TofT and RnRC for MGM(DHS), Kilimanjaro and Everest for AK. The only real expansion rides to established parks were Splash Mtn and Soarin (Space replaced Horizon). So now New Fantasy Land has replaced the long extinct 20k Leagues and Snow White with LM and 7D. In a few years there will be Avatar and eventually Star Wars. The pattern is really no different than the last 40 years.
Also remember, Universal is tearing down or retheaming for many of their new rides. Any time Disney does this, the fans revolt. A large population of adults like taking their kids to Disney to experience the same shows and rides they did as a kid. Universal does not have that same nestalgia so they keep reinventing themselves. Harry Potter was obviously a big boon for them, but it has not been proved yet if all of their other investments will yield similar results.