1. Volcanic Plate Shield. It's upgrades aren't as good as the difference between the volcanic plate helm, and the plate mail. Adding elemental resistance to the VPS would bring it better in line with it's armor (which gained both fire AND elemental resistance) Just like the Ironmight plate shield, which got piercing resistance just like it's armor set.
2. Ancient Plate. This armor makes no sense to me. 100% pure normal protection will get an Ancient Plate user killed in T3. Give it shadow protection or something, to make the extra speed penalty worthwhile at least.
3. Deadshot Mantle/Chapeau. Right now I have absolutely no reason to take a deadshot mantle over Radiant Silvermail. Both give a damage bonus to undead, but Silvermail gives better resistances, and the piercing defense makes it useful agaisnt jellies and beasts. Deadshot loses the gun benefits that makes someone want gunslinger armor in the first place.
WHAAT NO ELEMENTAL ON VPS? Thanks for the head's up, It should be more inline with the rest of it's set I was going to make it but...hmm. This being said, I THINK they set up all the armor to be equal to all other equal star level armor overall. And if they didnt, they should.