The "Large Smile" mouth is back! As are "Extra Wide Smile," "Wide Smile," "Shy Blush," and "Large Frown" (I'm not sure if "Scream" is the same as the "Ahh!" mouth or no). The "Sudden Blush" mouth is still missing, though, as is the version of it without the blush (the closest to it is the "Teeth" mouth, which lacks the two non-teeth pixels on the edges).
I also want to mention that the normal "Smile" mouth is bugged, appearing as a 3x2 boxy "u" instead of what appears in its icon:
[media]This specific mouth does appear to be fixed in the latest preview version, to be honest, but I still wanted to mention it just to be sure it's made aware of, because I recall seeing it fixed in the preview version in the past, only for it to still display incorrectly in the next full release (though I've likely not played enough to know whether or not it was truly fixed but then bugged again in the next release, in all honesty).
This happens even without a beacon; upon entering the Nether, the game will speed up your movement until you reload the world.
The "Standard"/default eyes are missing, now. Characters that already had them equipped will keep them as long as you don't change the eyes, but the standard eyes don't appear in the character creator's "Owned Eyes", only variants of them.