No docs in this post, sorry.
The P-38 was designed as an interceptor. As such, it was expected that the pilot could do things like switch fuel tanks, change prop pitch, and adjust the mixture at his leisure. The main reason for the difference in combat performance between the PTO and ETO was the lack of an Integrated Air Defense System in the PTO. Japanese interceptors were trying to climb up to reach the American strikes and the P-38's had the advantage in situational awareness and energy. In the ETO the Germans had the edge in both due to their high quality (for the time) IADS. The P-38's switchology was too difficult for the average pilot whereas the P-51 gave the pilot a better chance. Other factors in the P-38's performance in the ETO were lack of experience and relative numbers. The P-51 arrived when the US had more knowledge and more planes and the Germans had fewer.
The P-47 was a better fighter bomber than the P-51 due to greater range-payload and lower vulnerability. The P-47 was capable of handling the German fighters but at $80,000 a piece vs $50,000 for a P-51 the P-47 had to be used where it was most effective.