Adding my voice to this thread. ISP is Cox and my connection becomes completely unplayable after 6pm. Just re-subbed and brought friends over who are having the same issues (they also have Cox). Looks like we are being routed through LA also.

No other game is affected, but FFXIV and the Square Enix websites all are having issues.

This thread has been really insightful. Hope Square has a fix coming soon or else this is gonna be one short re-sub