The only use-case I van provide I'd at some point FFXIV was being routed to a bad tower or something which caused constant dc's / horrible lag and using a vpn to change the area / towers I would route to totally removed that issue.
It has since fixed itself and the vpn did help, but I don't think its a magical fix for bad internet
So glad Yoshi-P was able to get Yoshi-P on board with the 16 crossover.