JFK wouldn't have gotten much done.
His sexual and drug peccadillos were on the verge of being widely exposed by Republicans in time for the next elections. In those days that would have been devastating.
He'd pissed off so many people, including but not limited to J. Edgar Hoover, with his reckless behavior that he would have been absolutely discredited.
Not the least was his ongoing affair with Judith Exner while she had a concurrent affair with Sam Giancana, head of the Chicago mob.
Nope. For his reputation JFK died at exactly the correct time. And if anyone believes Lee Harvey Oswald did it and Jack Ruby killed him out of respect for Jackie Kennedy they are past redemption.
Arf