Warning, this is kinda nerdy stuff. Mixing is probably a mysterious part of the album-making process to most people, but it's super important. It can ruin a really good record and rescue a mediocre one. And it's not just technical, it can be an important creative part of the process too, in some cases even restructuring the arrangement of songs.
While I'm no expert in mixing, I'd consider myself an informed amateur. My master's is in music performance but I've long been into composing and computer music production, and have been paid here and there to write/produce/mix music. I've spent probably thousands of hours watching tutorials on mixing, plugins and production. So when I hear a new album, a big part of the experience is listening to the mix. And by and large, I think Dreamers has the best mix of any of Neil's work since, and maybe including, Time on Earth.
This is especially impressive because while they got a big chunk of recording done in a studio with David Boucher, the main engineer and mixer, as we know, much of the album came together during quarantine with band members contributing stuff they recorded in their own homes. The band members are all capable of recording stuff pretty well on their own, I'm sure, but it's still a challenge for the mixer to take a bunch of tracks from disparate sources and make them work together.
David Boucher is basically Mitchell Froom's house engineer, mixer and co-producer, so it makes a lot of sense that he worked on Dreamers. But even more interesting to me, Boucher was Bob Clearmountain's assistant for 3.5 years. Bob mixed Temple, Woodface and Together Alone, and a bunch of other stuff for Neil and Tim. He's also one of the most celebrated mixers of all time, having mixed stuff for Bowie, Springsteen, and a gajillion other legends. Bob is on record saying that Crowded House are among his very favorite albums he's worked on. While he's a genius mixer who can make anything sound great, he does seem to have a special affinity for Neil's music and understand it better than many.
Boucher has built up an amazing resume himself and I think he's a crucial ingredient in why this album is (in my opinion) so good and, without meaning to detract from his autonomy, I can't help but think the influence of Bob Clearmountain plays a part too. Here's a good interview with David Boucher: