Few of my poems on here rhyme and are still chosen for curation. I do give attention to the meter and form, or flow of the poetry; I look at each poem as a kind of art installation whenever I can. Medium doesn't make that easy becasue the platform severely limits what you can do with pure text layout.
All of my poems here, though are on themes promoting greater justice and equity in the world, and/or demonstrating "God is Love" in real terms in the world. So, I would say they fall in line with your advice on substance.
All of my writing adheres to the best of my ability strictly to grammar, spelling, and punctuation rules. In my prose, I write as I speak.
I appreciate the clear and valuable advice in your essay.