Im sure you make good points. I always want at least 300oz per servo, both throttle and steering. I personally think a servo is much like a rubber band. If you constantly operate it at the edge of capability, it's gonna break eventually.
I've had Hitec, Savöx, Protek and MKS servos. The Hitec and MKS felt the best to me in terms of smooth operation and feel for the car. The MKS were faster, not only on spec but on feel. I just felt I could control the car more accurately.
I'm sure thou that I'm not using the capability of my servo. But then again, why do you buy a Mercedes AMG? Because you COULD go from 0 to 60 in 4.8 seconds. Doesn't mean you do that at every light.