Part of the reason for the "waiting" was the massed Confederate artillery on the opposite ridge was waiting to "speak" to the Union Iron Brigade (see below, sitting under a massed artillery battery is one of the more unpleasant aspects of Fire and Fury. The jury was out with respect to the balance of artillery in the game rules, is certainly was "harsh" when three or more guns got together!):
More worrying is the fact that the Union reinforcements have appeared and preparing a counterattack on the Rebels flank (see below, Buford's delaying tactic have worked a treat and there is no place to hide for the Confederates, it is either face massed musketry or face massed artillery and charging Union troops):











