Recent evidence considered, it seems to me that it makes sense to regard the Kanmusu-tachi as anthropomorphisms, at least usually (possibly excluding the Shinkaisei-kan, fairies, etc. and maybe some odd individual cases)... But that doesn't necessarily automatically become a reason to tag them as such.

I was under the impression that one of the primary reasons we weren't tagging them as anthros is because the sheer volume of posts involved would dilute the anthropomorphism tag. If the majority of searches for anthros on Konachan would thus have "-kantai_collection" included in their search, is it still worthwhile to tag them? Or is it a waste?