Snake Featherston
Banned
Longstreet was commanding the attack. Ewell had his own attack on the right with two divisions (Early and Jonhston) and had attached Rodes to Longstreet's attack.
AP Hill had attached the right wing of Anderson's division, a wing of Penders and all of Heths divisions to Longstreet for the attack, leaving him 4 brigades (Mahone was reporting directly to Lee) to hold in reserve.
In the lexicon of battle management this is "taskorg-ing" the forces envolved.
So in other words when AP Hill "tasked" by leaving to Longstreet all the work involved in orchestrating those forces and thus abdicated responsibility, Longstreet and not AP Hill, is to blame for that.