Which increment in incrementalism is 'acceptable'?
Heller was good reasoning, good judges, good timing, and a LOT of good luck. Just remember how long it took to get to the SCOTUS, and how long it had been since the LAST major 2A case.
I do not share in the current reasoning that Obama winning means everything falls apart in four years. HE has to be careful with HIS timing too. They could ramrod through, say, a new assault weapons ban, watch all the challenges go through, and the year it's being considered in the lower courts, Obama loses reelection, two supreme court justices are replaced by conservatives, and the new court decided that 'assault' weapons are indeed in common use. It would be just as hard for them to stage a favorable ruling as it was for us to get Heller.
No one here is suggesting we get complacent. But this election is going to be FRIGHTENINGLY close, no matter who wins it. They will IMMEDIATELY have to start proving themselves. Congress has a NINE PERCENT approval rating. New gun laws is NOT what we want to see to start liking them again, and they know this. It's not just Heller. It's the protection from third party lawsuits, that 40 of 50 states are 'shall issue', and that public opinion is on our side. If you win by fooling 'enough of the people at the right time', it is disingenuous to immediately start doing all the things you said you wouldn't do in your campaign, lest they not get fooled again for the SECOND term. THEY KNOW, that the single biggest factor in the upheaval of 1994 was the Clinton AWB. When they get the hat trick and control everything, they don't want to throw it away AGAIN on such a hot-button issue.
I personally think the odds of Obama getting a second term AND keeping control of Congress to be pretty much impossible. I think he's promised so many things to so many parties with such an empty bank account, he will gloriously implode. He's Jimmy Carter, but remember, WE SURVIVED Jimmy Carter.