[Yoda]

It's not a world I made. Language is lazy.

At the top of the swing, I would call the wrist position open, closed,
cupped, flat, etc. per common useage.

Roger that, SuperDave.

And of course, the actual Clubface position makes no difference. We're
card-carrying members of the Equal Opportunity Lazy Linguists Society!
A Shut Face and a Bent Left Wrist are just the same as a Shut Face and
an Arched Left Wrist! Or is that a supinated left wrist? Who cares!
They go together nicely, don't you think?

I enjoy your Forest Gump 'chocolate box' approach to golf terminology:

You never know what you're going to get!