This is starting to drive me bonkers, now.
Why do the ceruleum drive wheels on airships not rotate any more? Back during v1.x, all the bronco-type airships (the ones running between cities) had a rotating wheel underneath their prow. That wheel is still there, but ever since v2.0 it's been absolutely static.
Until now I'd accepted this - it was even a nice surprise to discover that the drive wheel on the Dezul Qualan did spin when its engine was started.
But now we're into 3.0, and not only do the ferry airships' drive wheels still not rotate, the same is true of the special airships as well! Neither the exposed drive wheel on the Enterprise nor on the Soleil rotate no matter how hard their engines are working. Again, I was sad to discover this, but I suppose I wasn't hugely surprised..
And then we see the Agrius MkII (for want of being able to find its actual name) .. and NOTHING IS SPINNING ON THAT EITHER. At that point it's a glaring issue because the framing of the shot shows some of the many drive wheels on its spine and they're all obviously, glaringly static. It no longer seems like a simple omission so much as something being genuinely wrong emphasised by the camera work.
https://www.youtube.com/watch?v=lDSnzcaLaZg&t=4m43s - For reference's sake, this is the moment in the v1.0 intro when we first see the Agrius. Note the large number of these wheels on its spine, all moving, not to mention all the ceruleum drive wheels busily spinning and billowing blue exhaust on the various Garlean dreadnaughts and cruisers even before the Agrius appears.
I realise this is a petty complaint.. but isn't it equally easily fixed? If nothing else I would really like to know why it was decided that these wheels ought be static from v2.0 onwards. Not only does it just look weird and ugly, personally I thought the slowly rotating, blue-smoke-leaking wheels a cool signature element of Garlean/ceruleum technology.
Addition: Making the issue all the stranger, this issue isn't true of magitech enemies like the Magitech Vanguards/Vangobs. These machine do have exposed, rotating drive wheels that actually change the way they moved based on what the enemy is doing. Even more odd, unlike airships these models appear regularly during gameplay, where the game generally exerts far more computational stress under much less controlled conditions - which rather muddles the 'it's to reduce the rendering demand' argument.