What about a pilot fatigue meter that limits the activity of your pilot the more you throw your AC about? It's fair to say that there's a fair bit of real player tiredness with lots of action and long sorties, but no longer term G effects or muscle fatigue. The meter would effect what your pilot can do and would recuperate during less active spells.
Could be switchable of course....
(Hello BTW, been following the forums for months, but thought I'd contribute.... Thanks for all the great discussions!
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Badger