A conspiracy theorist might opine that the reason involves the current distrust of NSA-specified ECC coefficients. If NSA can't break ECC with well-chosen coefficients, they might well want it out of the picture.
But would the NSA really compromise the US government security by falling back on a much older and weaker standard?
I'm playing devil's advocate here I agree with you but I still don't understand what the NSA is thinking releasing a report like this. How can ECC be weaker then older standard.
In my post I was alluding to the NSA already have something other in the works to roll out at a moment's notice once the scare-factor takes hold.