I haven't read through this thread, I'd only like to react to the original post. Just yesterday a 109 jockey was whining in another thread about how Spitfires don't lose their energy and the FMs should be immediately corrected, and now here's a RAF jockey whining how the 109 never loses E.
This is so funny. While I agree that the current FMs need a lot of revision and far from being correct, these threads are nothing more than entertainment - such a typical thing in flight sims: you got shot down by a better pilot? Blame the FMs!
(I do it sometimes too
)