I know the struggles of categorizing things. I work in IT (And am ITIL certified) and I support the ticketing software that IT uses. We have “categories” and “subcategories” for the tickets. Hardware? Software? Process? Etc. And then for the next layer - do we list out each application? do we list out general types of errors? etc. and we always have complaints and we revamp it every couple years. It is difficult to make everyone happy. Totally feel the pain there.
Our goal in IT is to cater to the 80%. Do the categories/tags we have fit 80% of our tickets? Yes? Then it’s good enough. You will never reach 100% and will pull your hair out trying.
From my personal experience and in an ideal world I would see the categories and tags go one of 2 ways.
Either all of them related to crafting types and processes.
Or all of them related to finished products.
I feel having a combination of finished products and crafting processes is causing part of the confusion.
I also feel the 2nd option would be too large so I would lean toward the first option. For example under ART you have altered tin and you have shrine. I would do away with both those and have one tag called altered art. That would cover tins, shrines, and anything assemblage. (altered paint brushes, spools, spoons, etc.)
These are just my thoughts. I see both sides of the issue and know there is no “right” answer.