The cards are 100% in their hands. To say otherwise is just ill-informed.

For your WoW example you are confusing ping and packet loss (rubber banding). 300ms ping in WoW is very playable in PVE (Which is what I mentioned, PVP is another competitive game). WoW also handles a normal amount of packet loss just fine. It's when your packet loss climbs to a level that no game can compensate for that you'll start to have rubber banding issues in WoW.

FFXIV will start to rubber band at a low percentage of packetloss, because their entire networking architecture is designed for optimal connections only. The internet just does not work that way.

What about once your packet leaves your ISP and is routing through various backbones that do their own QoS and packet dropping? Is that up to us to fix, and not SE?

Really unsure why you are defending SE on this issue when it's clearly been shown to be in their camp to resolve through several other forum threads. You are the last of a dying breed on this specific issue, so carry that torch high.