Changing Tyson's style isn't that easy. It's like taking a square wheel and then making it triangular and saying its better "because it has one less bump!"
At fourty to try and become something he never was is not likely.
That only happens in rocky movies. Some styles foster longevity, Big power hitters and guys with good sound technical skills,like Foreman and Lewis. Tysons style was Based on speed, quickness and expending huge amounts of energy with the upper body bob. Even when he was young he couldn't do it for 10 rounds. Poke him with a fork and you'll see.....He's done. As far as legacy goes..for boxing fans memories of a great explosive exciting fighter whos ability may be overrated in the minds of some as time goes by. For the general public,he'll become just another tragic oddity with a wierd wrinkly face tattoo