What if the U.S. Army did away with officers entirely? How would things change?

Pretend the Army has done away entirely with commissioned officers. All roles have been filled by NCOs and the proper authority and training has been received and delegated, to include positions of command. AR 600-20 undergoes few if any rewrites as the term "commander" simply applies to NCOs now. Warrant officers are now warrant sergeants. The special representation from congress and the constitution that was enjoyed by officers is now given to NCOs serving in select roles. Some positions are removed as they are now seen as redundant, such as platoon leader and OIC roles. There is no longer an NCO support channel, just one direct channel from soldiers upwards.