Which specific rules are you talking about? I've not heard of them knocking on doors. Doesn't mean is didn't happen, but I'd like to see a reference.
What the new rules are attempting to do is enforce registration. 80 percent lowers aren't/weren't banned anymore than that hunk of aluminum in my shop. What did happen, and what the injunction covers, is the attempted end to the selling of un-serialized lowers but because the ATF still doesn't recognize an unfinished lower as a firearm, the injunction was granted. They are also trying to make it a little harder by preventing the sale of tooling/jig/lower "kits".
There is a memo from the ATF reaffirming what they classify as a "firearm" with respect to the lowers (rifles and pistols) and yes, 80 lowers are still just a hunk of metal.
I'm not above being wrong, so please lt me know where I've made a mistake. This not some "challenge" and I'm serious. I don't want to be wrong on this anymore than the next person.