I'd rather have categories be handled by us admins alone or at least initiated by us. The thing is, categories can easily end up a mess when contributors start adding them as they feel like it. They have a to follow a form of logic, or at least be coherent with each other. Fellow admin User:NinjaFatGuy and I were in the middle of reorganizing them last month. The release of King of Cards / Showdown and the holidays period didn't leave us much time to work on it. I only finished playing King of Cards last week and returned from holidays last Friday, and NinjaFatGuy won't be as much active across FANDOM as they were before as of now. If you give me enough time, I'll be sorting them out this month.
It probably has to do with the wiki now linked on the official Discord server.