Hi guys,
Thought I'd share if you are having the kind of lag in this thread:
http://forum.square-enix.com/ffxiv/t...rottling/page6
I'm running Private Tunnel and now I've improved my totally unplayable lag to bearable lag. Before my character got stuck whenever I tried to load a cutscene/speak to an npc or interact with an item. Its not perfect but at least I can play now!