Gyros added to current pattern plane designs may not make much difference. They will reduce the effects of wind turbulence, especially on more tail heavy setups. A purpose programmed fly by wire system could do more for you by compensating for coupling automatically or even correcting for wind drift. What's scary though is the airframe changes that gyros would make possible. Planes wouldn't need to be aerodynamically stable anymore, so a whole new generation of planes would come out in short order. It wouldn't take long before non-gyro planes would lose their ability to compete, necessitating either a special gyro class or simply relegating the current planes obsolete. Think of how purpose built fly by wire systems improved fighter jet performance, or look how the modern super car stability systems have made older designs seem slow by comparison.