Kathleen Kennedy will be making Star Wars movies for the next 10 years. Get over it.
3/4 Star Wars films she's done have done $1 billion+ like it or not. Marvel has 5 $1 billion+ pictures out of 19 films. That means 75% of the time they don't cross a billion.
Also to me someone who gets this worked up over a freaking kids movie is really a snowflake.
Also Solo is Lucas' concept and was in development before Disney even bought the franchise, it's the first time Disney used one of Lucas' ideas, and it stars a white male lead. So if anything the box office shows they need more Rey and Finn. TLJ suffers from that too, the second half of the film loses track of its main characters and turns into Luke Skywalker: The Old Fart Movie with the other characters basically put on pause.
The main fall out from Solo will be likely that solo Star Wars films like Obi-Wan and Boba Fett get shelved for now.