FDR was planning to resign after the war, but it sounds like you're assuming he doesn't. If he doesn't then:
No Vietnam War. The Cold War starts out more slowly probably. UHC maybe happens during this time.
If he does:
FDR advising an outgoing Truman would have major butterflies regarding the Cold War. No Vietnam War still.
Dewey in '48 for sure, so No Truman
