I'm strongly with Russo on this one: fixing or killing the measure of Adequate Yearly Progress -- AYP -- is central to fixing or killing NCLB. Ignoring, tweaking or otherwise fiddling with AYP in advance of actually passing and signing a new Elementary and Secondary Education Act is a terrible idea. It would preempt and confuse the entire discussion (which is perhaps the idea).
The other (bad) motivation for this is to make it easier to reward cities and states that the Feds believe are doing the right thing, despite the fact that they are objectively failing under the terms of NCLB. Otherwise, AYP limits their capacity to pass out money to their friends, allies, and business associates.