I would like to address this.
It seems to me that Lee was quite good at keeping his subordinate commanders in line, he was quite tactful in quietly removing those he deemed unable from the ANV in 1862 and indeed throughout the war. One of the reasons that Lee was well able to deal with subordinates was that he remained above much of the mud flinging that went on at the lower levels, and actually worked to help end conflicts between subordinates.
Of course, victories would probably help as well along these lines.
Lee was quite good in shielding himself, from having to make difficult choices in his personal relationships with difficult, obdurant or faltering subordinates.
But, in fact, what historical evidence that is available indicates he would not have been very successful outside of Va., if for no other reason than he did not think so either, i.e., self-fulfilling prophecy?