Certainly, discussions of what Obama needs to do are important and hopefully he's listening to people other than the usual suspects who always insist that Democrats must run as far to the right as they possibly can. But I think there's value in repeating this meme even though it isn't bringing immediate results. The Republicans have an unearned trust on the economy through years and years of propaganda that portrays liberals as irresponsible, profligate spenders, even as their leaders are on record saying things like "Reagan proved deficits don't matter, this is our due." It's important for liberals to stay the course on these memes over time as well, in order to counteract this ridiculous notion.
To be clear, I happen to think the "economic sabotage" argument is not going to work. Dems tried variations of this case for two years, and there's no evidence they bore any fruit. I just don't think voters will buy it, or if they do, they won't particularly care about it.
Also: At a certain point there's little percentage in making variations of the same old lament again and again that Republicans are out to defeat Obama politically at all costs and that it's folly for Obama to keep seeking bipartisan compromise. It seems like the better argument to be having at this point is over what Obama specifically should do to adjust to this new reality.