I'd be happy with that right now. I have been worried about this case since I first read about it, because I am not sure there are enough votes on SCOTUS to go this direction. Given SCOTUS's terrible -- and unconstitutional, in my view -- decisions on political speech (McCain-Feingold) and eminent domain (Kelo), I get very queasy thinking about this case. A "regulated" individual right may look less radical to SCOTUS than a truly "shall not be infringed" version, so it may be easier to sell them on that for now.
I am not privy to the lawyers' thinking, but perhaps they also believe there are better odds in going for a small bite of the apple, i.e. if they pushed for a grand slam -- and lost -- we would be in a world of hurt. Just think what a President Hillary and her buddies like Schumer would try to do with a collective rights interpretation.
Also, I don't know how much the actual facts of the one plaintiff still on the case drives the framing of the questions of the case. Remember, the D.C Court of Appeals has a very restrictive view of standing (and the circuits are split on this issue too) and ruled that only one of the original (6?) plaintiffs had standing. I believe Heller is the gal who vocally and actively opposes drug dealers and other vermin in her neighborhood, has been threatened for doing so, and wants a usable handgun to protect herself in her home. I think the lawyers are also asking the Supremes to expand standing in this case to encompass all the original plaintiffs, but I'm not sure of that, and I am too lazy to go look right now.
elb