Importing decks from Arena is already a fantastic feature that I am grateful to have access to for free. However, there are a handful of cards that have had errata on Arena that change the text boxes on the card therefore separate themselves from their physical counterparts. This can even change a named cards legality. (ex. Death-Priest of Myrkul vs A-Death-Priest of Myrkul)

Most, if not all, of them have an "A-" in front of their name when exported and on listed Scryfall. I would love to see these cards added to the database as digital only cards and have the import function updated to match these.

Apparently some of the Alchemy Sets are uploaded on the site, but there are quite a few missing. Some don't even have errata! (Celebrity Fencer #7 vs. Celebrity Fencer #A-7) are the same card!