A series this week by Jonathan Cohn takes this point as its premise:

Discussion of the House Republican budget has focused mostly on the privatization of Medicare, the block-granting of Medicaid, and the repeal of the Affordable Care Act. And that's appropriate, given the magnitude of the changes and widespread impact they would have. But those proposals are obscuring some other proposed shifts that, in any other context, would be plenty troubling for their own sake.

The discussion hasn't been quite that narrow, at least not among those critical of the GOP budget for 2012: there's been much talk (including here) about not just the budget's health-insurance program reforms but also the cuts that come with them, the tax breaks for high earners and corporations and the plan's highly imaginative math.