I've been noticing that my aim has gotten worse as well. The bullet deflection has gotten to point were hit sprites are not even visible anymore. This combined with the cockpit frame view, hitting an evasive target is 99% spray and pray and 1% skill.
I have to admit, when in a 51 I can out run almost any plane with a quick dive and WEP. Even when the multiple enemy planes are behind me at 400 yards I can extend away with minimal damage using minuscule stick maneuvers avoiding most enemy rounds.