Unfortunately, I can't see any improvements on the particular sets I was keeping an eye on, nor have I heard of any yet.
Maybe there's something that was changed, but it's really a shame we aren't getting anything clear about the arms in this patch. I wish Square Enix was more willing to at least say "we're working on it".
Here are the Fierce Tyrant's Gauntlets, Archfiend's Gauntlets, Vanguard Fending/Maiming Gauntlets + Armor, and one bonus (Augmented) Fighter's Cuirass. It's bad.
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They did at least fix the issue I reported where the Vanguard armor had an incorrectly-stretched part of the shoulder, but unfortunately that did not include fixing the hrothgar proportions.