New Pattern class?
I agree with don't change the rules to suit yourself but strive to be at the limit the rules, its getting cheaper and cheaper to fly F3A. You could compare it to IMAC and jets and get blown away with the expense.
What I see is you want to remove technology and in this way remove the expense of top-end pattern.
You may think that removing the computer radio would make it cheaper. The cost is not in the radio, any cheap computer radio would do, but in the servos, all digital/ core-less top of the line for both centers and speed, put this with the lith ion cells that some of these bigger planes nudging the 5kg limit need then the price goes up exponentially. You don't need to go this path though and still be competitive, The radio does not fly the plane, the pilot does. you could use the 4 channel radio, standard servos and nicad and still get the equivalent performance as long as you were skilled enough.
With the engines they will change to suit the rules, the price will still be there and the technology will soon replace the pump.
As anything that is at the top level, technology follows it and its great for the hobby, if the manufacturers were forced to return to past technology then the hobby wouldn't develop to the same extent it has in the last few years. just my 1 cent...