Why does this bug you? You say you wanted the category split between musicals and plays. Well, here you have a category that's only plays. That's sort of what you wanted, right?
Then you also seem to be saying that no score of a play could possibly be worthy of the award because there would need to be a "disclaimer." It sounds like you're saying that the requirements for the score of a play are not only "different" than that of a musical, but so much lesser as to make a best play score award ludicrous. I guess that could be an opinion. Is that what you're saying?