I dunno, I think that given the setting and how much more over the top this is... I can't picture previous Hulk's rocketing towards Surtur at such speeds, making him stagger so greatly from the impact. Back then I was advocating for Hulk to merely make him flinch like "eh, what the ****" like we'd do to a fly colliding with our face. That was me going for a reasonable underselling of a potential strength feat. Then the actual movie went above my expectations by having Surtur react quite extremely to the impact, and Hulk actually chipping off pieces of Surtur's crown when I thought Surtur would be just absolutely impervious to any sort of lasting damage in his prime form.
That's quite a far cry from anything I'd expect 2008 Hulk to do. Even his A1/AoU feats feel tame by comparison.
Then I know you consider Hulk shaking his head from the lightning blast to be proof he's not mega durable but I mean, okay yeah he's clearing his head big whoop. Not like he seemed even remotely close to be KO'd by anything. He always got right back up, even after being flung by Surtur. There's no lasting damage to anything but his armor. Fenrir managed to pierce his leg after quite some time of biting, and even then there's no lasting wound the next time we see him. His opponents had to work their asses off to just temporarily damage him.
Hulk was an unstoppable beast throughout and was pretty much only in peril by falling into the void. Even then, Loki did fall into the void yet survived. So even that would only be an inconvenience that removes Hulk from the movie's finale but not from the realm of the living.
Again, I don't know, I feel like this Hulk is just on a whole other level. With this Hulk, there's no him having to shield himself from Blonsky's grenade launcher, and no debate or question of him being KO'd by something that's not PIS like with Tony's lucky sucker punch. And none of this is necessarily concrete, he may have not even been canonically power boosted. It may just be Waititi going balls to the wall with how he portrays his characters abilities and the Russo's might not follow suit.