In fact it's incredibly easy to run away from a cruise missile. You just need to get inside the sensor to shooter loop, and move enough, and bob is your uncle.

As for a "non-traditional" sensor; unless the En is willing to dis-regard attacking possible third parties, then there needs to be some kind of final confirmation that the blip on the radar is actually your CVN. A 150nm SAR radar picture is all well and good, except when the Carrier has defensive CAP up.

I'm not denying that there is a need to ensure that the CSG (and it's composition etc etc) is the right answer to what ever question we are asking, but I don't feel there is a paradigm shift being brought about by the DF21.