I can confirm that this issue is especially affecting the content we can and can't do (well lots of cant do's). And SE's ignorance on this topic in general for the last year is starting to get fricking annoying. I can understand everyone who is canceling their sub because of this issue not being fixed or at least acknowledged and being addressed. All I have seen so far is the pointless copy&paste reply that doesn't help at all and blatantly ignoring the fact that only ffxiv is affected, not to mention said Moderator simply stops responding to topics when the copy&paste reply is not the solution.
Even tho I am thankfully almost not affected anymore by this issue since i moved to an optical fibre connection around 6 months ago there are still days when i get extreme high ping on EU with constant 10-20% packet loss and sometimes even more eventually resulting in random disconnects.