Wouldn't make sense to give those non-standard designed ships Starfleet materials.
They would probably look horrible in them as well.
Also in the blog it says
"and added to all Starfleet ships"
1. Why would it not make sense? An Andorian-designed ship is still a Starfleet ship, unless it's a rogue/privateer, and not part of Starfleet.
2. How do you know it what it would look like, without actually seeing them with the materials applied? Guess-work?
Canon supports the notion that an individual armed force (such as the Andorian Imperial Guard) becomes rolled into the larger Starfleet upon acceptance into the Federation. As the Andorians and Vulcans were part of the formation of the Federation, it's -possible- they were allowed to keep their individual military fleets, while simultaneously dedicating resources into the new Federation Starfleet. In this regard, we'll never know, as there is no canon to suggest otherwise.
What we do know however, is that there have been multiple ships in Starfleet manned by all-Vulcan crews. Standard Earth-based designs, or Vulcan-designs? We don't know, since we never saw them. And even if it's a Vulcan-design, why would it not be possible to apply similar hull materials to a non-Earth design?
3. "All Starfleet ships" sounds all fine and dandy. But then you realize how horribly messed up the system is in-game, where some ships have certain materials, some don't. Some ships can be discharged and reclaimed ad nauseum. Some can't. Fleet ships can't be reclaimed. Neither can lockbox ships. Does the blog go into detail on if these Fleet ships get the new materials as well? And if they don't, doesn't that kinda go contradictory to "all Starfleet ships" ?