RE: Why not move on to R/C ?
It is true that you can't roll the airplane. Control line racing is great fun, much more exciting than RC Pylon racing because of manditory pit stops, in my opinion. I've been flying CL Precision Aerobatics since my knees told me that I was no longer a racing pitperson. About 25 years now. The Modern Precision Aerobatic pattern is a sequence of 15 maneuvers. I find that the pattern is interesting, not boring, to practice because each maneuver is different and offers different challenges in doing it precicely and correctly. As you said, a precision event. Combat is fun to watch, and takes great skill to fly well. Of course, if you don't wish to compete, you can build an airplane and do whatever you can with it within the limitations of the situation. By the by, I have read an article about flying tethered RC. Not clear why one would want to.
Jim