This is definitely a step back in terms of quality, from Forsaken Skies. We've said goodbye to a lot of the cast from that book, and sadly, they get replaced by unlikable characters doing stupid things--perhaps more sadly, this effect extends to at least one of the returning characters as well: Lanoe. But I'm getting ahead of myself.
The shame of this is compounded by the fact that some of these characters are interesting when they're first introduced. Bullam is a Centrocor employee with an exotic and tragic medical condition, who's desperately trying to curry favor with her higher-ups. Candless is one of Lanoe's old squaddies who's tried to leave the life of a pilot behind to become a teacher. Bury is a rookie pilot from a planet that's so dry, hot, and arid that the people living there have adapted to have skin infused with special polymers. But none of that initial potential lasts: Bullam gets sidelined after a few chapters, when a much less interesting character is introduced and starts ordering her around; Candless ends up feeling like just a slightly more competent version of Elder McRae; Bury just flies off the handle at any given opportunity, like if you plucked Bakugo out of My Hero Academia and threw him into a space opera. And that's not even touching on the other new characters who were unlikable, pretty much from the start.
I think I have to talk about Lanoe now. He was always something of a hard-ass, but over the course of this book, he just turns into a full-on tyrant. At some point, he stops being the harsh-but-fair leader who makes hard choices to get things done, and turns into the high school bully who expects to get everything he wants, and if he doesn't, he'll just start hitting people until that changes. Figuratively speaking, of course, but even by the midway point, Lanoe had become an intensely unlikable character, who has no concern for the well-being of, if not his friends then at least the people under his command; the only thing he cares about is getting his way, no matter how ridiculous or dangerous his demands get. It makes his tendency to beat nigh-impossible odds again and again less thrilling and more frustrating, after awhile--I don't think that's a trait you want in your main protagonist.
Honestly, by the end, the only characters I could say I genuinely liked in this book were Valk, Ehta, and even Maggs, because they displayed some modicum of relatable humanity, or at least the propensity to not always take the stupidest option available by default.
It also doesn't help that lke, 3/4 of this book is a chase sequence. Centrocor wants the information Valk has, after interfacing with the alien ships, and they're chasing him and Lanoe all over the galaxy to get it. Even once Lanoe & Co. finally get a solid goal to work towards, most of it plays out with them still being chased. It's better than the insufferable space chase from The Last Jedi, but it does start to feel like padding after awhile.
2.5 stars, rounded up to 3, because part of me is hoping Forgotten Worlds is just suffering from textbook "middle book syndrome," and that all this connective tissue will lead to some actual meat in book three. Because this is still an interesting universe, populated by characters who have proven they can be personable, when they're not being sidelined, hurried along, or succumbing to their own tunnel-vision. Just, if you're invested in this series after the first book, be prepared for a bit of a slog with this one.