There should have been a question mark at the end there.
Essentially, Paul can NOT supercede Genesis... Genesis was misunderstood if it was taken as mandatory for God's people for all time. Jesus is also not "superceding" Genesis... but He IS defeating any notion that it can be interpreted to mean "don't receive Me".
We similarly know that the prohibition against pork was for a purpose and for a time (though it seemed inviolate at the time). I suspect there was a purpose for the "blood" rule. Perhaps the very purpose of reserving it for the One Acceptable Sacrifice.