Great thread, and lots of interesting 1:1 v.s. RC discussions.  Rarely seen, I think, and good to get our heads thinking about all the variables.
In my many years of both RC and FS, I have found my most successful coaching/teaching came when the pilot really "gets it"....The "IT" being - Maintain complete directional and positional control over the airplane to make it go where YOU want it to.
Pick something - a circle, a traffic pattern, an approach, a departure, whatever - but "practice" maintaining total control during whatever it is.

Oh.... and fly the RC plane as if YOU are in the cockpit.  Not outside on the ground.  But INSIDE, in the pilots' seat.  I guarantee significant improvement in your proper use of rudder during aerobatics, and mastery of the coming at you control issue....But you have to stick with it long enough to see it.

Try it.  It's a mental conceptual picture, but it SURE makes a difference in being able to put that thing where you want it to be.