SM
Bigfooty Legend
You're thinking of Star Wars as an event movie, I imagine Disney are thinking of Star Wars as a brand and a universe. Is Marvel diluted by the release of Black Panther, Infinity War, Ant-Man and Captain Marvel all within 12 months? No, because they are separate movies under the same brand. What Disney need to achieve is separating Star Wars from the Skywalker saga, which is what the current trilogy is seeking to do, so people can watch and enjoy multiple stories without thinking it's all part of the one Star Wars story.
If anything, they need less prequels and filling in the gaps, and more new characters and events that people come to think of Star Wars. Rogue One was a good starting point, the mistake was going to Solo next, when they should have set something new after ROTJ.
No, I completely understand that that's what they think, and I even clarified above that Star Wars is NOT like Marvel, and it's foolish of Disney to treat it as one.
Marvel is not diluted because each of their comics is its own individual brand within a larger Universe. Star Wars is the reverse case where you begin with a brand (Han-Luke-Leia) and then expand it (Vader, Vader's origins, Obi-Wan, Qui-Gon, Yoda, Palpatine) and then expand it further (Rey, Finn, Poe, Jyn, Qi'ra). Rather than making films around tentpole characters that had existing stories or huge cult followings, they are creating new characters and new worlds and new stories. Which is fine. But it dilutes the power of the brand and what makes Star Wars quite unique.