I really liked the trilogy. Thrawn is a lot better than the other books, but I didn't really start liking him less. I do agree that he seems to get more invincible as time goes on. That final battle was a bit unrealistic, even for Thrawn. Maybe it's that Nightswan (who is amazing) is more of a match for him, but it doesn't really seem that way. Thrawn is a lot better as a character in the Ascendancy trilogy.

I think the treason is all of them, collectively. Savit and Ronan, but mainly that Thrawn is bordering on Treason by working with the Chiss.

It's really more of a collection of novels than an actual trilogy. It kind of has to work around the gaps in Rebels, so Treason ends with Thrawn leaving to get space-whaled. So I guess that's why there's no big reveal?

I actually loved Treason, maybe even more the original Thrawn novel. I agree with @Captain Byib on everything else.

I am in the middle of reading it, and so far, I like it. Very excited for the ending.

I agree with ^^^ on those things, I can try to add a little though. About the trilogy, it was great to me and I think the biggest problem for it was that it had to fit in with Rebels. I am one of those people who doesn't like the space whale ending. The books did a good job not making it all about what happens in the show (kid's show I guess so you can't have morally gray villains) and telling an original story. I really liked all the hints to what is happening in the Unknown Regions.

Yes, the plan reasoning is pretty crazy. However, that kind of thing is part of his character I think. In Legends he's actually able to tell how many people moved between two ships from a recording. As for the title, like Byib said it's basically all of them. Sure, Thrawn is rooting out treason in the Empire, but he's also kind of committing it. You can see this little part in the conversation we see with Palpatine at the end. There is a theory that Palpatine planned a punishment for Thrawn because of this and Ezra actually saved him. I'm okay with that, though I think there could've been a better way to do it. I mean . . . space whales? Seriously? There is such thing as hyperdrive malfunction that would lead to the same outcome. Or something else maybe idk.

The big reveal is most likely supposed to be that Savit is a traitor, or at least that's what would make the most sense. Or there could be no big reveal. There's not necessarily one in every book.

I agree that Thrawn is a lot more developed character-wise in the other trilogy (canon). I think this might be because of what I said earlier about the Imperial one having to fit into what Rebels did. I recommend reading the Ascendancy books if you're into the subject (the Unknown Regions issue).

^its probably about Eli technically committing treason as well. I LOVE these books so much, as most people know lol. Two dimensional villans aren’t my favorite, and so the books adding that extra layer to Thrawn made me love his character more. Timothy Zahn is a fantastic author and does an excellent job with pre-existing characters like Pryce and Anakin, and I think that Eli was a great example of how Thrawn affected the people around him, for worse or for better. It was also interesting to see someone who could keep up with Thrawn. The ascendancy prequel books are also good, if you’re interested/haven’t read them already

I’m glad you guys liked it…I really loved Thrawn when I first saw him in Rebels…O also enjoyed the first two books…but I was pretty disappointed by Trewson though…again, I did expect a big reveal or twist which to me did not happen…I don’t mind Thrawn winning the battles in the end but they were all so one-sided that they lacked any drama in my view…very underwhelming