And in an odd way, in some sense we crazy evangelical/Protestants might be able to approach the “transubstantiation” claim from a different direction, that of a definition of body.
Let us posit that a body is a physical entity occupied by a spirit.
If the spirit of Christ can occupy the bread and the cup, then that very same matter has been repurposed, as it were, into being His “body.” It hasn’t changed of itself, however, unlike in the Roman doctrine.
Anyhow this is as far as I dare to go.
Experientially, most of the way I get the spirit of Christ is through direct faith — as even Roman Catholics know they must keep on doing when they have left the Mass. The boost I get at the communion is a side feature in my partaking of His spirit, not the main one. If anything I go into it as “Lord I believe; help Thou my unbelief.” Believing and obeying (carrying on according to the desires of the Spirit) is the thing that makes robust partaking in His Spirit possible. It is a flow — not a static thing.
Would you ever partake in Holy Communion in such a Mass, if comes true?