The Chaladon ships have absurd, feathery-looking decorations in the back instead of the metal fan designs like on the Squid and Goldfish, which I think look better.
The Baronie ships are strange looking mostly because of the small balloons. If their balloons were larger, encompassing more of the hull and making them more zeppelin-esque, they would be much more believable. As it stands, they look like they must be using extremely lightweight construction (which I believe, given how squishy the Crusader is), or are heavier-than-air airships and use some vertical propulsion to assist flight (see Mobula's front fan-thingies). That said, it's still somewhat believable and at least it's pretty.
The Anglean ships look absolutely insane. In my opinion they should've gone with the Spire's more dieselpunk style (lots of black metal with wood and metal screens used in flooring, vertical construction and decoration, pointy bits like something ripped out of a factory). Instead they went with teslapunk, which is not necessarily a bad thing. It's a really cool if somewhat niche aesthetic, between dieselpunk and raypunk based more on the World War 2 era, submarines, fighter planes, battleships, and of course arcing electricity. However the way they've done it takes the Baronie ship problem up to eleven. They don't look like they should be able to float. The best way to resolve this would probably be complete overhaul of the balloons. As it stands, the balloons don't look nearly big enough to hold those things up, and the ships' thick metal construction doesn't help.
The Mercantile ship would be fine, but that spinny thing is based on the design of perpetual motion machines, which makes me want to rip it off and go after the shipwright who put it there. It's probably why the ship moves so slow thanks to that pointlessly wasted energy.
The arashi ship looks alright, though the balloons are a bit small in my opinion. It would look more floaty if some of the multiple balloons were just merged into one big one, as larger balloons generate more lift per amount of mass used in the balloon than multiple small balloons (has to do with minimizing surface area, like water drops, bubbles and party balloons).
In general with these designs it looks like they tried to move away from dieselpunk.