While i agree that the progressive view of communion is a huge and vital step towards realizing anything close to the scope of "peace on earth good will towards all"...but it seems there are even more steps possible...but steps that cannot be taken until that radical human inclusivity is first introduced.
And imho, a next step possible after a progressive view communion is an even more whole-istic view of communion…where we not only connect the dots between food and medicine, but between human diet and the well-being of the rest of life on earth…and this includes the quality of the air, water and soil.
In other words, it is progress if everyone can eat, but even more so if everyone can eat in a way that prevents both illness and the desertification of the earth.
edited to add...and i cant help but feel that if Jesus was trying to imbed a better way to live in the language and imagination of the world...it at least included such ecological and medicinal concerns.