The inventory statistics right now show normal cards vs tokens vs others, and foil vs regular. Would it be possible to add columns that show how complete my collection is by rarity (e.g. 101/101 common, 5/15 mythic)? Perhaps in a new tab, since it is more of a sub-division.

Then there's also a small display thing: The card quantity columns are right-aligned but the total below those columns are left-aligned. Now it looks as if the total belongs to the column before it when I don't look carefully. I think the total should be right-aligned, too.