As a short term strategy, Universal's consistency in opening new attractions is brilliant. They are keeping their momentum going and people are going back to see what's new for the year. In the long term, however, I don't think they are doing what it's needed. The last universally acclaimed attraction they opened was Forbidden Journey, seven years ago. Even Gringotts, which is surrounded by one of the most inmersive lands ever created, is described as underwhelming by many (trust me, I dreamed of a Gringotts coaster for years).
With Kong, Fallon and possibly Fast and Furious all being arguable filler attractions, I don't think Universal has anything to compete with until Nintendo land becomes a reality. Many argue that Universal's recent success is still tied to Potter, which is somewhat concerning, in my opinion.