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No way.
I wouldn't change a thing.

After having read the book I was pleasantly surprised when Hooper survived.

Ok of course you are entitled to your opinion but, imo most definitely not! This film is brilliant and the ending is pretty much perfect as it is. It had to be Brody who killed the shark, he was the city boy, the one terrified of water so I think it worked out perfectly that he was the one to end it. It was a great ending.

Sorry, but huge no. Maybe if Quint had survived, but Brody and Hooper dying in favor of Quint wouldnt work for the film. It is not Quint’s story.

If Quint was the one to kill the shark, then Quint should have been the protagonist of the film. And in IMHO, someone could make a very good film about just Quint and Brody on a ship, bitching at each other and trying to out-shark-expert each other.

But the film is unimpeachable the way it is. When it's just Brody and the shark left, it's much more suspenseful than a scene of just the shark and Quint, or just the shark and Hooper. Quint and Hooper are experts, Brody was do out of his depth that he was almost helpless on the boat, and that's how you make a film suspenseful.

Original ending had Quint punching his way out of the sharks stomach

put it this way, NOBODY complained about the ending.

I’m pretty sure Quint wanted to die, given his actions & irrational behavior. Such as smashing the radio to bits & letting the engine explode & not caring if they were stranded. The guy was nuts & he did everything he could including basically forfeiting Brody & Hooper’s lives just so it could be the shark & him.

Interesting scenario you've brought up. I've always thought the movie version of Quint got the worst of the deal. He relates the Indianapolis story, so we know the horrors he endured -- and why he's lived with a vendetta all these years. He also dies a horrible death in the jaws of the shark. In the book version, he simply gets a foot caught in one of the barrel ropes and is pulled under, dying by drowning. There is no evidence in the book that he's ever bitten by the shark.