I think lumping all of this into "our new payment processor is a rigid, non-flexible machine that can't/won't compromise, therefore some people are just gonna be out of luck" is also pretty irresponsible.
This isn't Paypal's game, this is ANet/NCSoft's game. They're responsible for making sure everything works, not Paypal. If your business partner isn't able to provide its intended services in-full, on-time, and at least tries to resolve any defects, then this partnership should be re-considered.
The mere existence of these articles, and the fact that they've been around for months indicate that they've known about these risks/issues for a while now, and instead of attempting to solve the problem, the best we've gotten are...FAQs?
FAQ articles are supposed to be the first line of defense when it comes to responses to customer complaints, and when they don't provide sufficient, valuable, actionable information, customer service should interject and handle things case-by-case. However, this doesn't seem to be how the process flow is currently designed, as more and more people seem to be getting funneled BACK to these articles by customer service instead.
If you know there might be issues related to this topic, authorize your CS team to override it.
Maybe we're too insignificant of a minority for ANet to even bother responding to - our money might just be a drop in the bucket compared to overall sales figures, and therefore doesn't warrant a response. But seeing as how they also still haven't provided a definitive release date for the expansion pack yet either, i'm gonna chalk this up to poor communication and/or a lack of resources, which are definitely fixable.