Perhaps labels would still be useful, but instead of labels that imply a value judgement, descriptive labels would make more sense? I’m thinking quickly that there could be provocative art, critical art, entertaining art, personal art, etc. Both high and low art could use any one of these labels. There will always be arts critique and I think there always should be, but I do think “high” and “low” is pretty subjective and you’ve given great examples of the blurred lines (SORRY couldn’t resist!).