The radio is not a reflection of what's popular or what people want to hear.
Airtime is devoted to what's marketed by record label $$$ and not by audience demand.
Lil Wayne running Windows 95 isn't selling any albums
As for evolving as a band and changing their style, Linkin Park isn't owned by its followers. They do not have a responsibility to appease hardcore fans. If you don't like the new music, simply move on, LP is betting on someone else taking your place.