I still think they don't know what to do and how to do it. They've painted themselves into a corner by classifying vaping and tobacco as equals. There are many prohibitionists that want it all gone and they will go after the FDA if they ban vaping but don't touch smoking. Then vapers will go after the FDA as well for the same thing.
That leaves them the only option of going after BT, which I honestly don't think the government can afford to do, let alone the representatives. They are facing the same thing they faced before enacting Prohibition, which anyone that knows their history, saw how that worked.
As a matter of fact, depending on what they do, it could be a violation of the 14th Ammendment. I'm leaning on the equal protection under the law part. Vapers and standard tobacco users are considered the same under the FDA. Therefore it would be difficult for them to create a law that punishes one type of nicotine user over another and or provides freedoms/privileges to one user over another.
That's really how the public vaping bans started. It was illegal to say you can vape but not smoke, when they are classified by the ruling body as the same thing. I could be wrong about it but I can see where this could be presented to the Supreme Court before implementation or afterwards. That of course, provides it's own set of problems right now since we don't have a full court.
Again I have no clue what they will do, none of us do. I just don't see it being as cut and dry as they are saying. It's all going to come down to how they word what they do and if it can legally stand or if it will be adjusted or completely thrown out. The FDA for all the bluster, is going to have to tread carefully and methodically, before doing anything. Remember they not only have to work within our Constitution, they also are part of NATO and must work within it as well. The majority of NATO partners support regulated vaping not banning (I know a lot of the laws are brutal).
EDIT: I mean USA being part of NATO, UN etc. not the FDA directly.