Stalin breaking all his promises for a free Eastern Europe was what FDR expected?
I didn't say anything about what Roosevelt expected, I'm talking about what Roosevelt thought he could get out of Stalin given the overwhelming importance of the Soviet contribution in the European War and the popularity that importance had bought the Russians in the US.
FDR's last few weeks on this Earth tell otherwise
The biggest highlight of FDR's last few weeks on this Earth is a tirade about how Stalin was breaking all the promises he had made at Yalta. So yeah, he was pretty well aware of what was going on. He was also well aware of what his limits were and he dealt with Stalin within those limits.
and I have to suspect if he believe he would have he would have gone with a more Truman like policy.
Had Truman been in charge 1942-45, his policy probably would have been no different then Roosevelt's for largely the same reasons: the US had to back Stalin because the Soviets were the ones breaking the Heer and, in doing so, saving tons of American lives. This immediate, military reality blatantly overrode any longer-term post-war political concerns. Tellingly, Truman in the '42-'45 period was wholly supportive of FDR's policy toward the Soviets (as Truman's attitudes tended to reflect the attitudes of the American public and the American public was wholly supportive of FDR's policy toward the Soviets). And even when he took office he by-and-large stuck to the US's ends of the wartime agreements and was relatively lax in dealing with the Soviets compared to how he would treat them in the post-World War 2 environment.