A 'Mark' would follow the Mindy's scheme, to which I'm not as opposed to as I am to the "Super". At least, people don't keep calling the Mindy II the "Mindy Two". It's "Mindy" most of the time, and "the Mark II" mostly when its technical/logistics people talking about specific versions (the appearance of the Sylph II and Daisy II kind of messed that up, though).
The Irim gunship followed a similar process. "Oh, we got DOGA and can actually make it look like something" and then later "Hey, I'm fairly sure I can grab DOGA and make a somewhat better rendering of the Irim".. Although the Irim hit the 'Mark II' revision on the YE 30 upgrade, it still was called "Irim-class" and that was it.
However, my issue with it is that such a denomination wasn't really needed in the first place. It's not like the Plumeria class got called the "Super Plumeria" or the "Plumeria II" when Wes reworked its scale, found out it was a bit too large to be a 'light gunship' and renamed it a "medium gunship" along with putting a bevy of random turrets all over its main body (which, in my artistic opinion, broke the design language with the Sakura-class... but no one ever listens to me about these things anyways).
For the Eikan, it was a realization that it wasn't all that large for a ship that was called a heavy cruiser. Wes got called out on that (by me, as it happens), but then, all that was needed was to sit down, figure out what kind of numbers were needed for something that would be called a "heavy cruiser" in the Star Army of Yamatai, and then change those few numbers. Not litterally make a new ship class and practically wasting the lifespan of the name "Eikan" on so little (I hate wasting good names, especially when it's not needed). It was mostly an OoC reconcepting because, as far as anyone ICly in the setting was concerned, the Eikan never actually changed because the oversight had never happened. Because it could not have had happened.
Also, I really feel that the "super" in front of the name just sounds retarded.