I saw Solo on Saturday. I was underwhelmed. Not bad, but I think my overall impression is that this was an origin story that really didn't need to be told. I also felt like the movie was fairly generic, in the sense that the story didn't feel like it could only have been about Han Solo. Change Chewbacca and the Falcon to some other sidekick and ship, and this could have be just any other space story. I was also confused by big surprise toward the end because I haven't seen either Clone Wars or Rebels. Maybe I'll get into those some day, but I'm going to be somewhat unhappy if they start pulling stuff for the moves from the "extended universe" (or whatever the proper term is). Maybe I'll feel differently about this movie if there are sequels, but right now, I wouldn't rank this terribly highly.
By the way, if coinciding with the release date of ANH was really "the primary factor" in deciding when to release this movie, that's just nuts.