I never got an overheating with the Fw 190D but once, when I forgot to disengage the MW-50. In combat I fly with full throttle and only use the MW-50 for short times to close in to the enemy.
P-47s or P-51s are no match for the Dora, I can win a turn fight against a Pony using t/o flaps. Spits are a problem, they turn tighter but are slower. I can leave the fight whenever I want and try to get a better position. Or just run away and survive.
The Dora is superior if You handle it right. But I admit that all the guys I flew with in MP are preferring the Kurfürst in dogfights. I do not.