I'm giving up on this series. If it's "Kris Longknife, #16.5", I've presumably enjoyed the series enough to read sixteen-or-so predecessor books, so what has changed?
The characters have changed, for one thing. This is a spinoff series, tied to the original by continuity of background and a few secondary characters. The secondary characters were peripheral to the original stories, and have remained two-dimensional in the spinoff. Mostly, they are convenient caricatures - the computers are cute, the scientists have the answers, the officers are efficient. It's hard to care about them.
The space-combat action has not changed, unfortunately. The author has written himself into a numbers-game corner. The enemy has enormous resources, so if our heroes can just-barely defeat them at ten-to-one odds, the author can ratchet up the tension by sending twenty-to-one. (The good guys will still win, of course.) If the good guys win by pulling a new technology out of a hat, the author can compensate by having the next wave of attackers show up with two new technologies. At an important level, the victory is never in doubt and the victory achieves nothing - so the space combat stops being interesting.
The writing was replete with errors that a copy-edit pass should have caught, such as spelling mistakes (in these days of spell-checkers, spelling mistakes manifest as bad homonyms, misplaced-or-missing words, etc.), which have the effect of jerking the reader out of the moment.
I didn't enjoy this book enough to wish to read its sequel.