I tend to frown on books that don't wrap their main plot at end. When you're on a long series, it's a no-no. It tends to make me want not to have purchased the book until the real ending was around. This is the case with book 7 of the Expanse: it starts with a major plot... and leave everything in place for the next book.
There's changes, minor plots, characters move all around, of course, and hints for the next book. Just like in book 5. But every time I think back on what I just read, I'm thinking of book 5 and Marco (instead of Winston). Just with the stakes raised a bit higher. And since it's the last trilogy of the Expanse, I don't even have full confidence it's going to be resolved in book 8. In fact, I'm probably going to hold on buying book 8 instead of preordering it as soon as it pops, like I did for this one. At least until the reviews hint that the Laconia plot is, indeed, resolved.
So, 3/5 stars.