You are a Troll
How many armors did not make the list because they are made for unimplemented classes aka currently useless in game (and they occupy the pinnacle of armorcrafting as well!)?

Crystal Scale
Shimmering Truesilver Shirt

are two that come to mind immediately. I wonder if they have unique and interesting Art Assets for them that might be repurposed for other armors that reuse lower tier art?

The list identifies the best Armor match for a given Armor Feat at a given rank. If Crystal Scale and Shimmering Truesilver Shirt aren't in the spreadsheet, it's because they're not ever the best match for any rank of any Armor Feat.
Nihimon murmurs in sheer ecstasy as the magic courses through his veins