Seems undergraded to me on a quick look. I guess maybe they think it was dipped to death, but the luster looks great from here!
What generation holder is this in? I see a lot of older slabbed Commemorative halves getting GOLD stickers at CAC.
I don't think you really care about CAC, but based on your photo this seems like a no-brainer for a gold CAC sticker.
I thought this coin was under graded by 1 point, but CAC did NOT think so and agreed with NGC, as it being a high end MS62. I have since sold this coin. Just ordered me a book on grading, might try to figure out why.