Hey man,
First of all, excellent mod, it really became one of my "must have" to play.
I would like however, to point out what I think looks semi-illogical. Most of the Shooter builds revolve around landing critical hits and the Vortex Enchantment kinda of breaks that in a way that seems very bad. Might I suggest the critical reduction from hits to 5% and not just reset to 2%?
To be honest, I think this effect should be changed whatsoever, since all other Pillar Enchantments carry something related to the set item, while the Vortex seems off-place and pair very poorly with the Soul of the Sharpshooter, making it's Critical Chance increase for ranged null. I would suggest, just as with the other, that this enchantment granted the same effect as the set, allowing for toggleable stealth.
Anyway, your mod rocks!
EDIT:
Also, I'd like to report the same bug.