I realize that the Ent-B was just a redress Excelsior, they just didn't want to damage the original Excelsior. But what other Excelsior Class refits are there? I only remember seeing the Ent-B as one. We see plenty of Excelsior class ships still in service in TNG and DS9 and I think even Voyager in Endgame and I don't recall any Ent-B style refit ships.