I agree with much of what you said. My main differing opinion is that despite our ability to be as safe as possible with pigs, for instance, they are still unclean animals that wallow in the mud and eat anything you put in front of them and have potential for parasites. By their nature and what they're capable of eating, if given the chance to do so (even sight unseen, despite our best efforts), puts them squarely in the "unclean by design" category that God intended for as long as sin reigns on the earth.
I also think there's a correlation, a parallel, between unclean meat and the sin of the flesh that should be drawn here. Both are harmful, one to the physical body, one to the spiritual body.
I believe that God's design for the curse of the fall is binding until sin is no more and all is made anew. That all that He has said, that He has given to us, is for our own benefit and that none should be dismissed as done away with; aside from the obvious (the tearing of the veil, etc.)
I would also point
Those are my thoughts. All are free to disagree.