Of course not. They'll do the same thing they've been doing for years : "interpret" and "define" the law (or court ruling) to suit their agenda, until it the judge slaps them down again and clears up the slight ambiguities the ATF relied on.
BTW, as I said before, they WON'T be going after individual consumers in any case. They don't have to. They know they can be much more effective by threatening manufacturers, vendors, certifying authorities, etc.
For instance, they can tell vendors they'll lose their license if they sell reloads to non-permittees. Sure, the vendor could challenge them -- but until the case is resolved he has no permit and can't sell motors. So he gets to watch his business go down the toilet while the case slowly works its way through the court system. Eventually the judge tells the ATF that yes, reloads ARE covered by the PAD exemption. But by then it's too late -- the dealer has gone bankrupt.