Embiid is just an impossible variable here. On one hand, he looks incredibly slow (especially on defense). On the other hand, he still averaged 30/9/5 with a TS% of .641 after coming back in the regular season, and Philly has won 9 straight games (and they might have needed all of those wins in order to make the playoffs). Does he look slow and winded because he's rusty and/or out of shape (in which case someone could argue that he'll get stronger as the playoffs go on)? Or does he look slow and winded because he's still hurt (in which case this either ends with him getting re-injured badly enough to knock him out for good, or Philly eventually crumbles when they come across a team that can play on both ends of the floor).
Embiid's uncertainty is why Philly has (to me) the highest ceiling in the east outside Boston, but could easily lose to the Knicks in 5.