Planes that will be affected? Can try to guess. Anyone feel free to correct any bad guesses/assumptions here
We already found out that non-fighters (like bombers) are getting the worst penalty, so not going to talk about those.
For the fighters & fighter-bombers, without knowing how their G-rating is like. Wo knows, some aircraft might have very high rating and not be affected at all.
Good turning ability at low speed: Turning hard means more G generated, but if traveling slowly enough, it does not necessarily amount to a very high amount possible.
Result: Minor Penalty
Good turning ability at medium speed:
The G's start to stack up if turning well. The aircraft that turn well in this range tend to turn REALLY well although the
Result: Large Penalty
Good turning ability at high speed:
Potential to really mess up the aircraft if being a bit reckless on the elevator controls. Good instantaneous turn rate in combination with high speed is maximum Gs possible.
Result: Large Penalty
Good roll rate:
Completely unaffected by the change.
Result: Large Improvement (relative to other traits getting worse)
Heavier MG's/Cannons options:
Strapping on heavier guns and ammo means does not mean more G's, but more strain on the wings at any G-loading.
Result: Large Penalty
(Bf-110's Bk 3.7 cannon, and Mk 108's come to mind as well as all kinds of gun-pods)
Using a fighter platform for bombing (fighter-bombing):
The greatest penalty of all, especially if it is a well turning model with high speed abilities.
Result: Very Large Penalty
High internal fuel capacity:
Had some benefit in being able to fly around a lot without suffering the drop tank speed penalty. The drop tanks can at least be dumped at any time to lighten up the plane.
Result: Minor penalty
Forgetting to jettison bombs and drop tanks before maneuvering wildly:
Result: WINGS OFF!
The traits are so dependant on the type of fighter, and who knows of how durable each model is. Are energy fighters going to be affected at all as long as they stick to 'energy fighting'? Are turn fighters going to be affected much, as they can already turn beyond blackout point and still probably be below the service loading? Will the FW-190 be affected much, as it's roll rate is more valuable but the quick short jink style turns are less available? Will the twin fighters get affected by their heavier armament/bombs and poor roll rate, as they usually go into battle with very low fuel (compared to what they are capable of carrying) and them probably being built to be very sturdy anyway? Will diving fast make much of a difference, as the elevators suffer compressability at high speed anyway?
I think the Fw 190 will be affected when on the defensive. And that single-engined fighters will be worse for bombing and fighter-bombing. I cannot tell about twin engined heavy fighters when carrying bombs out there... the lighter bombers (AC-20) is already known to be affected strongly, and how much different is the 110 really? If rockets are much lighter than bombs, then the P-38's should become an even more preferred method to kill things on the ground with.
Having a very heavy bomb-load will be worse, in any aircraft. Maybe there's more incentive to choose a bit less extreme bomb load.
Drop tanks to carry fuel in should be more valuable than putting it internally (done to avoid the speed penalty of drop tanks otherwise). The tank can be jettisoned any time anyway and the manuverability is unaffected then.