This is one of the those films that is aging well for me. I didn't love it or hate it when I first saw it, though I went into it wondering why it was even made (I know why - $$$). I feel like Han Solo is one of those characters that doesn't really need a backstory to figure out why he is the way he is. But alas, we got that story anyway because it was a marketable name.
But after watching it a second time (and now third time), there's some really good moments in this and some great sequences. Some of it was a little much for me (how Han got his last name ... really??), but it's a fun movie and one that was the victim of TLJ backlash and behind-the-scenes turmoil.
The spinoff stories have turned out pretty good thus far, but both are stories that I don't think had much to add to the canon in between the main stories. I really REALLY wish they would have started the spinoffs with the story from the first Force Unleashed. I love Starkiller and his story in the first game. That one, I think, would translate well on the screen. Maybe we'll get it one day ... fingers crossed.