I wanted to step in here and mention that this request hasn't been forgotten. The Digital Support team and I have started an initiative to better align our product taxonomy across support entities. This includes the Support Site, Knowledgebase, and Community.
I'm hesitant to add anything new right now since its likely to change in the next few months. If I can get a list together of what's missing, I can probably go ahead and add categories for them.
Community Manager \\ NetApp