I thought Love & Thunder was entertaining, but not as good as Ragnarok. I think the villain wasn't as effective as he could've been and didn't feel like as much of a threat (other than looking creepy). But to me, the real problem with the film was trying to portray Thor's relationship with Jane as this love for the ages...it just didn't really work. Mostly because in the previous films, it just didn't make sense why they were together other than "Here's two attractive leads who ought to get together in this movie because it needs a romance."
Thor's a himbo (even back in the original), Jane's a socially awkward astrophysicist. It might've worked if you'd showed their relationship more organically, but the first film just has them get together (which, I guess, we can forgive as "Hot people find each other hot"), but then the second film splits them apart and does it again, and yet makes it seem like their relationship was even closer? Then you get Thor showing up in multiple films (Age of Ultron, Ragnarok, Infinity War, Endgame), and Jane's nowhere to be seen...and now she's back and the love of his life? What? You can't just "montage" your way through that. I mean, the film did its best, but there's no getting around the disconnect between how these two people feel about each other on screen vs. what you didn't see between them.
I didn't care as much about the humor. That didn't bother me too much. The Guardians films already had plenty of that. But the narrative backbone of the film was just underdeveloped due to stuff completely out of control of the film itself, which then left the film feeling uneven.
All that aside, I question the wisdom of hiring him. It reminds me of the Lord & Miller hiring for Solo, and it feels like another one of these "Yeah, we're gonna have to reshoot like 60% of the film" things again.
Of course, this all presumes the movie even gets made, and I think that's...doubtful. At this point, Star Wars has had 3 films announced and definitively canceled (Kevin Feige's film, Weiss & Benioff's film, and Rogue Squadron), and at least four or five more announced but in development hell (Rian Johnson's trilogy, Taika's film, and whatever the post-ST films end up being). That's 8 films announced that either never will or have yet to make it to the screen. And that's not counting stuff like Colin Trevorow's Ep. IX and Lord & Miller's version of Solo. I'm inclined to take all announcements of Star Wars films as just so much hot air at this point, because their track record hasn't been great. And I can't help but think that the performance of Dial of Destiny is gonna have them taking a step back and seriously reevaluating their development strategy.