...And now we have "Raptor" to round out this collection. What to add? Might "Buzzard" be a type of salvage tug?
I was always under the impression that Klingon cloaks just weren't all that great
Perhaps not in the late 23rd century. But in the TNG era, they seem to be of very high quality, allowing the Klingons to penetrate all the way to the Romulan homeworld in "Unification"...
None of this invisibility stuff makes sense if we take literally the statement in "Balance of Terror" that invisibility as a concept is purely theoretical as of the 2260s. But if we forget about that one, it seems that Romulans had started toying with visual obfuscation technologies around the mid-22nd century, and had not quite worked out all the bugs yet - whereas other species had fairly well-working invisibility devices, either due to having started earlier on ("Unexpected") or having received aid from the future ("Broken Bow" et al.). Klingons might have achieved their invisibility tech simply by carefully reverse engineering what they got from the Xyrillians, or by stealing from a series of other players until they found a high quality technology they could understand and mass produce. Either approach might keep them behind the Romulans until the 24th century but get them ahead of the competition from that point on.