From what I am understanding a few points Hamas wants changed:
The US ceasefire proposal says israel only needs to leave the populated areas of Gaza. Meaning Blinken is saying that he wants to let israel occupy the “non populated areas” of Gaza
Hamas wants israel out of Gaza.
Israel wants to continue their Genocide if a deal has not been reached after 6 weeks.
Hamas wants a permanent ceasefire and the ceasefire should continue indefinitely after 6 weeks if there’s still discussions ongoing.
For the rebuilding of Gaza the US would contribute ~400 million dollars to rebuilding Gaza (damage estimates 30-40 Billion from UN) after giving israel 26 Billion in weapons. Did not read a comment about this from Hamas but this seems rather low.