The series wasn't a complete disappointment. I actualy like most of the world arcs (except for those of Agito, Faiz and Nega World). Shinkenger, Hibiki, Great Rider War and Black/RX were the best world arcs by far.
It's also good to get a Rider series that ends with a good cliff hanger once in a while. Especially when it has a movie that ties up the ending after the series end. Faiz failed with this but Blade pulled it off nicely with just the series itself.
As for W's movie, I'm also looking forward to it.