Subject pretty much says it all...does anybody know what happened to it? One presumes that there was more than one.
It's been redressed as the Saratoga I and II as well as Captain Batesman's Soyuz class starship. In the latter case, you can see a lot of additions to distinguish it from the Miranda class.
I think in the Star Trek universe, the Miranda Class of the 23rd and early 24th century was Starfleet's version of the mass produced "all purpose" light cruiser. Cheaper than a Constitution or Enterprise class heavy cruiser and more capable than the destroyer. In most games, it's an intermediate between the destroyer (or sometimes Oberth "Grissom" class) and the Constitution/Enterprise classes. Slower but more powerful than the former and faster and almost equally armed as the Constitution/Enterprise but not as much power generated and can't take as much punishment in battle.