I had to come back for this. So sue me.....
I don't think there's anything wrong with the canon ships. It's just a matter of taste on his part, which is cool. They ain't gonna be for everyone.
For me, I have a conceptual problem with some of the unofficial ships -- simply because they don't feel right, universe wise to me. Below isn't meant to be contentious, it's just how I'm perceiving things.
All of these factions, or nearly all of them, are suddenly fielding BIG hybrid battleships/carriers with powerful guns (primary and secondary), rockets to take down FACs, and attack craft of their own. As if these minor players have been taking notes the instant tactical innovations appear on the scene, and then commission ships to address every and all contingency. The Greeks aren't playing catch up. They're fielding something that can go toe-to-toe with anyone. So are the Danes, and Siam. And I just dunno about that. The names are different, but in a ton of ways they're remarkably similar to each other.
They're great math wise (very efficient with their hull space), and yeah, you'll be hard pressed to design a ship that doesn't get hurt trying to take them on. The Danes are monsters. But they don't feel right to me, and being the fluff guy, I like ships with a fixed mindset in place. And these tend to feel the same (no offense). I'm not talking about "this ship has a lightning projector, and I thought that was limited to the Brits." I mean, Siam has a big 20+ ship hull with powerful primaries and a pair of FACs. The Danes have a big BB with powerful primaries and FACs, along with a Heavy Cruiser with big primaries and FACs. Everyone carries rockets. Most of them has a D6 (X4 or X5) torpedo. Not trying to pound it into the ground, just making a point because to me THIS, rather than folks sharing a bit of kit here and there, makes everything taste the same.
As for Canon ships,
The Turks have some big ships, but they aren't groundbreaking, and their design overall isn't uniform. It's a mish mash.
The Germans, to me, look like commerce raiders. Lots of guns that could decimate cruisers and light vessels, but not many big bruisers.
The Austrians were also built with a specific philosophy in mind. Decent gunnery ships, but nothing spectacular, they were meant to rely heavily on FACs. You better not throw the Hunyadi against a battleship, and the Ersatz is a powerful battlewagon, but it's not a FAC hybrid. Because in the Merchant War, FACs are brand new, and I didn't envision many folks coming up with such an idea for a capital ship.
The Italians did, though, a couple of years later with De Monarchia. Again, they're built around something that seemed to be a theme in real life. Lots of primarires, and fast, but they've got a glass jaw.
The British, in my mind, are great because they are a mixture of a lot of different approaches, but then, they're the faction blazing the most trails. BTW -- I would put the new Cornwallis and Nelson against just about any vessel.
The ABCs have some good ships, but not that many big hulls. The Spanish likewise. The Spanish have a ton of little fellas. Feels right as they're not a financial powerhouse, according to the fluff.