Bull****. I think it dipped a bit, yes, but the fifth was even better than the second (IMHO). The sixth is my least favorite, but is still written well and has a decent plot. The seventh through ninth are good pieces of writing, and while I don't particularly like the tenth because of lack of combat, it's not a bad book. The eleventh is epic, and the side books (bringing it to fourteen full length novels at present) are all wonderful stories.
Bull****! The side books were all awful, and as the stories went on, they became increasingly turgid and bloated. The second one was the last one to offer a decent, well-paced, self-contained narrative.
Honor turned into a colossal Mary Sue. Seriously, look at this. She has:
-a telepathic cat
-who is sentient
-who now makes her ambassador to an entire alien species
-who is an effective personal self-defense weapon
-who allows her to acknowledge her feelings for her one true love
-a husband
-a wife
-both of whom are married to each other
-royalty status on two planets
-massive wealth on two planets
-a personal kill count in the...'big' range
-an indirect kill count via fleet tactics in the millions
-intuitive talent at using multiple archaic weapons
-like swords
-and .45 handguns
-a constant feed of new technology that makes her totally invincible (Apollo missiles, pods, CLACs, Ghost Rider before that)
-been exiled, came back; been captured and 'executed, came back;
-a huge fan club, including subordinates who repeatedly sacrifice themselves for her
-tremendous beauty, but she's 'self-conscious and unaware of it'
-a gun in her finger (no really)
-and little children love to listen to her read stories.
And that's just getting started.
War of Honor was a huge book, and that huge end battle took up dozens (hundreds?) of pages. But it could have gone like this:
"Honor's fleet jumped in. A billion missiles flew everywhere. EVERYONE DIED."
It was kinda fun for all that, but man, those books are just SO bloated with infodumps...ugh.