Good - concise - review. I Have just finished Caro's "Passage of Power" the latest part of his massive biography on LBJ. I'd - given your interest - recommend it.
As for "delving slightly into what a 2nd term Kennedy presidency" that for me is the fascinating aspect largely ignored by almost everyone.
JFK's pristine image is locked forever on the man who died, not where he might of taken America. Would he have a) won a second term in 1964 and b) if so - and it is far from certain - where would it have taken us? JFK was an enormous risk taker and a cold war hawk, I find him a far more uncomfortable politician than most seem to.
Extrapolate, make your own mind up (it also works for Caesar and Bonaparte) but if a fraction of the speculation on the assassination was devoted to " what might have been," we would have i) a clearer understanding of American politics and ii) some genuine insight on who killed him.