Actually, Jinzin had plenty of sections in the Wolverine thread for that. How adrenaline affects the speed of his healing factor, how adamantium affects it, etc. Wolverine's HF is actually pretty damn complicated and claws, as basic as they seem to be, still have many questions unanswered about them.
Superman's flight has been the subject of many discussions, too.
You're right, too many writers have made it hell. Some examples:
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Writer A: Wolverine doesn't need an active x-gene to pop his claws.
Writer B: He does.
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Writer A: Healing factor only makes the pain worse and doesn't deal with the phantom pains.
Writer B: Healing factor comes with some pain tolerance.
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Claremont (monday): Healing factor makes Wolverine helluva strong.
Claremont (tuesday): Lack of his healing factor doesn't make Wolverine any less strong.
😂