I honestly wish they would do more Planeshift articles for the MtG settings that don't get a major crossover book release like Ravinca, Theros, and Strixhaven.
I'm happy with the settings already covered by the previous ones. And more Planeshift articles would pretty much be able to cover/give us a bit enough for ones like New Capenna, Eldraine, Ikora, etc etc. The ones that don't have a chance at getting a major book.
I feel that would be a good compromise.
Unfortunately, the Art of X book line ended years ago, and keying off of those was the reason for the Planeshift booklets: they stopped when the art books stopped, then Jane's Wyatt went back to the D&D team.The Art of X books are really great, almost like a system agnostic setting guide. I've got the one for Dominaria and Zendikar (both settings that I think would make great DnD settings) and they have a lot of lore in them and combined with the art it really brings the settings alive. I wouldn't mind getting a couple more of the books, Tarkir and Eldraine I think would be cool.