Wow, I did not see that Ford administration coming. Reagan's presidency seemed a bit 'too' similar to his OTL one, if you'll forgive the gentle criticism - it looks like he's perceived as a gentleman actor who knew how to move a crowd and take bold decisions, and those decisions divided opinion. That's essentially OTL, though his economics have been shifted into 'Fordism'.
Fordism itself is a lovely idea, a sort of American Brezhnev, a Troika in the Oval Office. Inspired.
Kennedy was a clever move - we did something different in our version but just making him an old, crippled man thanks to his Addison's is an entirely logical choice. I like the idea of a second FLOTUS-that-was-really-POTUS.
Carter, liberal icon taken from us too soon? Sounds like a perfect inversion: a man who is well-remembered because the world saw too little of him, rather than a man disliked because he had to deal with far too much.
Not-so-slick-Willy is again, plausible, you use his heart troubles well to create a stiff figure (so to speak...). Bush Jr as a loudmouthed national healer is inspired.
I await Barry with interest, will he have a fate similar to Blair in Shuffling The Deck? No expectations, turns out to be a massive reformer and the public grows to love him?