Hey there
@ZOS_GinaBruno and company!
I noticed there wasn't a thread that directly addressed the new Appearance category and changes within it. Specifically in this case, I was looking to provide some feedback regarding Hats and Headwear.
I tried on and tested each of the four hats available, and all of them fit and looked fine without any clipping issues that I could see. My only nitpick is I wish there were a way to not have 'hair' go away when wearing a hat, given that ESO has a finite number of available hair choices at creation, unlike a modded single player game, I wasn't sure why this was neccessary. But this is a minor quibble.
However there is something somewhat disturbing that I discovered with the Vosh Rakh mask/hood. If you wear the Vosh Rakh, then toggle helmets/hats off, your face changes/deforms to a completely different face. I'll post some screenshots below to demonstrate in contrast with Cadwell's Helm.

Here is my toon without headwear

Here is Cadwell's Helm

Here is the Vosh Rakh Mask

And here I am with the Vosh Rakh toggled off... a victim of Orcish Plastic Surgery!?
Not sure why this happens with only the Vosh Rakh Mask, but I figured it's an oddity that spoils the debut of your new Appearance Hats category, and should probably be quickly reported and fixed before going Live. :-)