All I can add is that one of Soult's own senior officer remarked about Soult that
"This proud man of borrowed reputation was full of confidence the day before a battle; he recovered his confidence the day after a defeat; but on the day of combat, he couldn't given an order, take a position, or have a movement of troops carried out. It seemed that a plan devised and organized at his desk was a decree from above, no part of which could be changed."
(Maximien Lamarque, MEMOIRES ET SOUVENIRS, ... vol 2, p. 182.)
dg