Since about a week ago, I've experienced horrid lag spikes in dungeon and raid content. Everything will just freeze and then a few seconds later everything reappears in a totally different spot, which makes dungeons neigh unplayable.

I've never had this issue before, and it's definitely not my hardware. I sincerely doubt it's my ISP or connection, considering I tried pinging the NA Dataserver and did it in .48 milliseconds and everything else except XIV works fine on my PC.