A good idea on the performance issues

[Redroach]

thats a 'maybe' from me. I, for myself, striving for maximum realism (actually, I'd buy a DCS: Bf-109E-3 or a DCS: Spitfire MkIa in an instant!), would love to have production tolerances simulated in a reasonably good way.
But, let's face it: That would mean thousands of threads like "WTF? Same plane outclimbing me! BUG!" for years to come...

As for engine failure probabilities: there's actually a slider for that in general loadout options, regulating engine/airframe 'age'. Though I presume it doesn't work, just like the rest of the loadout screen.