Ever since the maintenance that expanded server capacity, users with a Verizon ISP in Virginia have been experiencing major lag in FFXIV. The game is borderline unplayable for these users.
This can be seen by a large amount of posts in this Official forum thread and this thread on Reddit.
This lag is ONLY affecting FFXIV, no other games are having this issue. People with other ISPs in the same area are not having any issues. Also, Verizon ISP users outside of Virginia are not having any issues.
I've tried rebooting my router, port forwarding, calling Verizon customer service, and even using a VPN. None of these have had any affect in reducing lag. I am hoping tonight's maintenance somehow fixes this issue but I am highly doubtful. SE needs to get in contact with Verizon in Virginia because 1. this is a very specific issue and hard to explain/get any help from Verizon CS and 2. this issue is ONLY affecting FFXIV.
tl;dr: Something very specific is causing major lag for ONLY Verizon ISP users, ONLY in Virginia, ONLY in FFXIV