I think that NOT having to deal with tuned pipes and retracts may attract more pilots to compete. I like not having to mess with them.
We just experienced a great contest at the Texas Wings flying field. We had a great time just flying planes, visiting and talking about airplanes, and NOT repairing or fiddling with them.
As for having gyros in planes to compete, maybe those that still need a gyro, still need to learn to fly.
Frank