As a fan of Soylent who put 4 years in infantry myself, I gotta say, you should try to train your stomach to deal with MREs and field chow.
As a soldier, your job is to be ready for war. At war, they can't supply special needs. If you can't eat the same shit they are giving everyone else, you are not ready for war.
Soylent in garrison is a great idea, and may help you find ways to tolerate what they give you in the field, but until the Army adopts it, you need to find a way to adjust youself to field chow. Enzyme supplements, probiotics, I would just start trying shit.