You have presented nothing new here. That Scripture does not support the Real Presence is a matter of opinion and not fact, since for centuries Catholics have believed otherwise.
The word transubstantiation is merely a human word which may or may not inadequately explain a Mystery of God which is beyond our human knowledge. Man cannot know the mind or ways of God for he is not God.
And, really, cannibalism? That’s why all those who could not take this hard teaching left.
Oh, WELL SAID. Every time I read one of the protestants saying that the Real Presence would be cannibalism, I want to know if they've read the entire passage.
Exodus 12:14,17,24; cf. 24:8 - we see that the feast of the paschal lamb is a Perpetual ordinance. It lasts Forever. But it had not yet been fulfilled.
Christ initiates this on Passover to be the everlasting passover as promised. To be consumed as the old testament lamb was also. Otherwise God did not keep his promise forever.
http://www.scripturecatholic.com/the_eucharist.html