A few years ago, Universal's ad campaign was entirely about mocking Disney. I remember radio commercials where kids would complain about how they are too old for princesses, and false/hypocritical statements about how Disney "closes early" and "never adds anything new."*
The commercial didn't say things about no new things, it was little kids who were tired of princesses and fairy tales. Universal was showing consumers that there was another option for those who wanted a more cutting-edge and modern experience.
Even though Disney is ALWAYS open later than Universal and Islands of Adventure went 11 years before adding anything significant.
Well for one thing they opened IoA as a full day park, as opposed to any park Disney has opened after their flagships. Also, if you consider a new land to be the only thing that is considered "major," then how long has it been since Disney opened something "major?" Besides, it's not like they were doing nothing. They were building out the Studios park.
Not to mention that every year they throw what is considered to be the best theme park haunt event, where everything they put in is either new or re-designed. Every year. 8 houses, 2-3 shows, and 6 scarezones, and they grow every year. Not to mention, they also listen to their fans, and do things for them (see: LegendaryTruth and Fright Yard). I think it would be nice if Disney treated us more like human beings and less like annoying flys.
Also, Universal isn't afraid to laugh at itself. The Horror Make Up Show is both informative and hilarious, and the Simpsons satirizes Disney, SeaWorld, and especially Universal. Heck, they make fun of theme parks as a whole, and I think that's hilarious.
/rant