Gaining approval is easy, it just has to be better than the previous version and accepted by the exchanges and you can force an upgrade by blocking old versions. If you need to upgrade to the latest version to use the exchanges and if you also have new features then you definitely would.
But I'm here just for the entertainment value, we already have PayCon that we can make changes to since we always have 100% approval. ie. If you don't like it, make something better.
How about this: offer any legitimate XPY holder the opportunity to convert into Paycon at fixed ratio for a period of time. Destroy the XPY as you receive it, and viola Paycoin 2.0. Of course you blacklist conversions from the coins held in the PCs, as well as any coins that can be traced to a GAW or Garza wallet without proof of payment (to protect the poor fools who ended up buying his dumped coins).
AND the way to do that is to have an exchange that has both coins on it. Let XPY holders buy Paycon if they want. If the Paycon group wants to subsidize that, all they need to do is list paycon on the exchange for very low XPY prices.