I think that we in Sto need a Miranda Class Refit. Not a VA lvl Miranda, but a Commander lvl one would do just fine. As another escort. This ship was used so much that its kinda sad that its only a beginning lvl ship. And that the Constitution class was ranked higher than it. When the Miranda can out gun and out run the Constitution class.
Since we have Nebula at t3 (and a again at t5), I'm thinking that Merian-class would be nice as a skin for the t5 Nebula or as a stand-alone t5 starship.
They're never going to make a T5 Miranda - at least not until after building your own Starships is added to the game and you can possibly craft it yourself - and they're never going to use the Merian because CBS doesn't own the rights to it.