In 1998 when they announced that they would NOT be applying Spectrum Pricing to aviation they said that they would have a one price radio licence for aircraft. Large aircraft were charged several hundred pounds and light aircraft £35 at that time. They were going to even the price to around £250 per aircraft.
I believe I was the only person who responded, and recommended reducing the light aircraft radio licence to the minimum admin cost; they subsequently reduced it to £25. That was what responding can achieve. AOPA were not interested in responding on behalf of GA when I made them aware of the issue.
The more response, the more likely they are to think again; remember response is public consultation and they have to listen. Typically, the level of response in the GA world is between 1 and 2%, so that's the proportion who decide what happens!