Not really. You've made conjectures based on the apocalypse death storyline, onslaught besides the fact the none of these stories have ever said "his powers were enhanced, changed or altered". So far as we know he is the same Wolverine that Tigershark imbedded in a rock years ago and almost killed. Furthermore, during "Enemy of the State" during the DareDevil fight he was supposedly dying before Hydra teleported him away. Then again in the follow up "Agent of Shield" he was in sick bay not once but twice for extended periods of time. I did not see his regeneration powers then, certainly not such capable to rendering an entirely new body in mere seconds. Whedon's run as well shows him as quiet "normal levels" as a sai to the stomach put him out of commishion for the entire fight with Ord of the Breakworld.
So no, all you've done is justified not only bad writing as "upgrades" but you'd be unable to prove these "upgrades" were even consistent with the CURRENT character, let alone his levels in the 90s, 80s and 70s. All it boils down to is most writers these days due to a poor editor and chief who is unable to organize his business enough to get books out on time don't bother researching the character. They are not reigning in his writing staff like DC does. DC has consistency throughout their books, something Marvel created in the 60s and again in the 80s called continuity. It means one book effects another, and each book is responsible to protray the characters correctly and accurately. Marvel gave up on that and because of it Wolverine can withstand a nuclear explosion.