If we're using 'the object in question doesn't exist' as the baseline for comparison, I'd say that the clear floor actually has positive utility. That's just counter-intuitive because we have such a strong tendency to think of the case that's currently normal as the baseline, rather than the 'doesn't exist' case.

I do agree that neither of those baselines is objectively correct in any sense (though the 'doesn't exist' one seems a bit more coherent and stable if we find a need to choose one), and that remembering that properties don't have independent existence is generally useful when considering possible cases.