I get confused with my non-foils and foils. I think there should be a separate column for non-folis. I don't know how others think of this?

It would be nice if there was a warning that pops up when "Load your collection from a file" like "This will remove current collection and replace it with the cards from file." I forgot that and had my collection wiped but good thing that I had a local backup that I like to do after adding tons of cards.

The List needs to be updated. Wizards say the list is not set in stone and can be changed around for each set by adding cards. I opened Adarkar Valyrie that is part of The List but you don't have it. https://magic.wizards.com/en/articles/archive/feature/updating-list-kaldheim-2020-12-16

I use TCGPlayer to scan my cards and export to a CSV file. If I don't have foils in the CSV it imports fine. But with foils I get NaN under Foil count. I also tried to use UrzaGatherer format and it still get the same problem.