I Should've elaborated on the "take away the shocking ending" stuff.
Memento, Se7en, The Machinist, American Psycho, and The Mist feature shocking endings. But each film provides a more intriguing ride to the end, I can't same the same thing about The Usual Suspects. The plot is fairly simplistic, and without the "Kaiser Soze" twist, The Usual Suspects would've been another forgettable mystery/suspense film.
As far as defining films of the 90's goes, The Usual Suspects is recognizable, but when it comes to popularity, The Usual Suspects is middle-of-the road at best. Terminator 2, Goodfellas, Titanic, Toy Story, Pulp Fiction, and Jerry Maguire are just a few examples of other films that triumph over The Usual Suspects as defining films of the 90's, especially when you consider popularity, quality, and memorable moments.
I can see where you're coming from with the "cramming nods to East Asian cinema" criticism, but I look at as another way for Tarantino to pay homage East Asian cinema. He did the same thing with Jackie Brown (paying homage to blaxploitation films), and the end result was fantastic film. Tarantino took a similar approach with Kill Bill Volume. 1, and he nailed it.