You’ve found the sweet spot; a compromise bill that everyone to the left of Snowe and to the right of Jay Rockefeller can support.
I have no idea if Rockefeller would really vote against this bill, and I don’t really care. From what I’ve seen so far the subsidies appear bad enough to make it very likely that this bill will be a substantial political disaster for Democrats (which, of course, has policy implications down the road, which this bill will be quite vulnerable to without a public option). The sooner Baucuscare is tagged as DOA, the better. Snowe may well have done the Democratic party and the cause of real health care reform a huge favor.