^ Can we be honest for a second regarding the "duty uniform?"
Do we know really it's a duty uniform? It could be a slightly warmer uniform than normal that Scotty is wearing.
Can you really see that much detail on it? The uniform will look considerably different on a four story screen with an HD RED cam on it rather than a little phone spy cam. It's hard to pass judgment on something until you actually see it for what it is. Particularly at low rez.
Whatever type of uniform it is, based on Scotty's, over at Trekcore, they're saying that looking back on it, what Quinto was wearing in the dressing room wigs selfie was a reaveal of this new uniform, too. If so, the Starfleet emblem must a pin, as they were in TNG, and not permanently attached to the uniform.
Link:
http://trekcore.com/blog/2015/08/quintos-wig-photo-revealed-new-starfleet-uniform/
They were metal pins in the first two nuTrek movies.
You're right, of course. I guess it just hadn't occurred to me until I saw a uniform without one (Spock's in STB). Also, it looks more like a pin on Scotty's uniform in the STB stills than I remember it looking on the other uniforms.