The Chaos datacentre appears to be living up to its name. I've had a lot of lag these past two days but only in FFXIV. Everything else is fine. I hope it's temporary and not a sign of incoming server strain due to the expansion launch. I think I read in an interview that the EU datacentres haven't yet been reinforced/upgraded in the same way as the NA and JP server clusters have been.

I took a week off for early access. That should be enough time to at least get some gameplay in even if things are chaotic.