Do you mean real life BoB pilots trained on Tiger Moths and then Harvards? I don't think so.
There were 2 levers you used to control your engine and that was:
1. throttle (same as in 109, you move it forward and you go faster you know)
2. propeller pitch (same as in 109, but slightly easier to reach before the Daumenschalter got introduced)
everything else was the same. Of course later, when the LW came with the Kommandogeraet equipped fighters, things were much easier just as you say. But in the BoB era all you had was RPM you had to tinker with constantly even during the dogfight (what we have in game as Drehzahl lever in the middle of the instrument board was certainly a bit awkward to control, I always admired the LW pilots who could do that and fight - must have been great skill) and that's the reason they put it on Daumenschalter on later models, you would still had to tinker with it more than the RAF pilot who had the set and forget RPM CSP lever. He basically also only had to work with the throttle lever doring the combat. As for E-4 automatic PP, it wasn't exactly great right from the beginning and especially in the high alt, it was common procedure to switch to manual and work with the lever again in order to get some extra speed up there. If the E-4 pilot uses the throttle lever in the combat and auto PP, the RAF pilot would use the RPM lever once to set combat RPM and then just throttle lever. I don't see much of a difference. Even using both levers was natural and they were close together.
There was nothing wrong or more difficult on RAF setup imho, I believe that in order to get the max performance from you engine, pilots of both sides would need to show same amount of skill.
Neg-G effects are irrelevant for pilot's workload. It was certainly a big limitation but it was also quite natural to them all.