The following is from American Military History, Volume II, U.S. Army Center of Military history, 2005. The book is a survey history intended for junior officers and NCOs that doesn't go into a lot of detail. Here's what it says about the founding of TRADOC and FORSCOM.

At an impasse between the Parker Panel and CONARC recommendations, Westmoreland in September 1971 directed his Assistant Vice Chief of Staff, then Lt. Gen. William E. DePuy, to begin a separate Headquarters, Department of the Army (HQDA), study to examine ways to streamline CONARC’s organization and resource management processes. DePuy concluded that CONARC was unwieldy, unresponsive to HQDA and the Office of the Secretary of Defense, and slow to adapt Army school curricula to incorporate doctrinal innovations coming from CDC. In February 1972 DePuy obtained the Secretary of Defense’s approval to break up CONARC and CDC and reassign their functions. Arguing that the collective training and maintaining of the readiness of active and reserve component Army units in the United States was a full-time job for any commander, DePuy recommended transferring all these functions from CONARC to a forces command. He further recommended consolidating CONARC’s schools with its combat developments functions from CDC into a doctrine and training command.
The book is available online at the link below:

http://www.history.army.mil/books/AM...index.htm#cont