Not quite sure, as I don't think we have any paper products implemented as an element. I will discuss to make sure no cardboard is falling into the masterbatch before extrusion!
To be honest, I'm sorry you feel that way, I wish i had a proper answer to that question. Being in this industry you hear so many varying opinions as to what a product is or isn't, it could make you lose yourself. I've heard not durable, the most durable, too soft, too stiff, best tension maintenance, worst maintenance, incredible feel, no feel, the list goes on and on. At the end of the day, everyone has an opinion with many different variables, gauge, racket, string pattern, customized / non customized, constant pull / dropweight, technique, etc, etc.
Back to the technical part of the question. The shape of the string while unique and the most aggressive shape / sharpness out there, helps grab and bite the ball, I'm not sure that would be the direct cause of your NO feel. As the shape obviously does change or enhance (at least we think so!) the feel of the ball in and out of the string bed, I think the material of the string might attribute more to overall feeling.
What tension and gauge did you play it at ? If it felt like it had no feel, it might have simply been played too tight. Although it could have been your normal tension, all strings especially different shaped , different stiffness levels, etc. can cause for an adjustment period of finding the right tension for that particular string.
