This is a good book, but nowhere near as good as the first (best) or second (very good).
Let's start with the 'me like' stuff: John has a nice, easygoing writing style, so even if there isn't too much happening in the book, it's still quite all right. Overall, the arch-story of the series continues, and we get additional exposure to the politics of CU and the Conclave. John Perry is back, it's first person again, and the focus is now on the colonial side of the union.
Unfortunately ...
The Last Colony does not have the careless humor and the adventure of the first book. Old Man's War was sweet, sad, mysterious, funny. The Last Colony feels forced. The guys are going on a mission to setup a colony. Very Amish style. Jane is there, and Zoe, too, and it feels a bit awkward. But then, when they do finally start the colony, you get almost no glimpse of the world around them, and the encounter with the local life/population is quickly forgotten. Almost like a checklist that someone forgot to check until after the book was written and released to the market.
Then, the interaction between protagonists - mostly John and everyone else - is extremely formulaic. They all talk and think the same, including supposedly sleazy politicians and alien generals. They all have this laid back mid-West US talk, and they use the word 'no offense' all too often. It makes no sense. Even people from a different country on our little planet have completely different mannerisms, idioms, and way of speaking, let alone an intergallatic bug-like species from a distant world. C'mon.
The few battles that are there are quick and emotionless. The twists are somewhat predictable, and so is the honorable rebellion attitude. John is no longer the wise old man, he's a maverick Marine who wants to do good, regardless of what the Universe needs or thinks. And again, we have more conversations between John and different generals, quick dead-pan delivery sentences that sound like arguing but in fact are manifests of self-righteousness, more 'no offense none taken' moments, and the identical personality repetition for each and every character.
In a way, it feels like what's happening with Joe Abercrombie - when you milk it too much you lose passion for your own work. Which is why I won't read more of this series, especially as I don't care about this identical storyline from Zoe's perspective. And it's no wonder that John wrote Redshirts, because it allowed him to go wild and carefree. And it shows. When you write for fun, it's fun. When you write, because there's a contract, you can feel it.
This book could have been a lot better - more variety among characters, more suspense, more planetary exploration, more profound engagements between species. The way it's done, it's: Let's pretend to be Amish in space and then have long discussions with alien generals around Bushido code in a Texan accent.
Limerick:
There was once a planet with no name,
Where John, Jane and Zoe came,
Obin and Amish,
Peril and perish,
EVERYBODY talked the same.
Igor