RE: Engine right thrust or rudder slaved to throttle?
I'll second that. Everything in this hobby is a trade off.
I'll give you a couple examples.
Topflight p-51 Mustang with a Fuji-64cc 20X12 prop. not a bunch of right thrust. Flies fast and does good straight war bird maneuvers.
During takeoff as soon as the tail comes off the ground get on the right rudder and throttle up to takeoff speed, the amount of right rudder is constantly changing due to many variables.
Aeroworks 1.20 Yak 54, YS110 17X6 APC prop, a LOT of right thrust.
point it down the runway and hammer the throttle, rarely do I have to correct with rudder for takeoff. when doing a flat spin I use the engine right thrust to my advantage, if I try to flat spin with power against the right thrust of the engine it's not a very good flat spin, at least i can't make it look good. If I use the right thrust to my advantage and flat spin with the engine thrust it flattens out nicely and I can develop a nice powered flat spin (or inverted) that looks real good. Point it straight up and do a slow climbing roll, I'm not sure that I could do it without all that right thrust in the engine. maybe a better pilot than me could, but i sure couldn't.