As Napoleon says: 'However, according to a very precise order, you ought to have been at Dornburg, which is one of the principal passages of the Saale, on the same day as Marshal Lannes was at Jena, Marshal Augereau at Kahla, and Marshal Davout at Naumburg."
As I said, that is what he was expected to do. That is what he attempted to do. He didn't do it until too late. Bad soldiering and negilent leadership. While Bernadotte would perhaps have liked to see Davout fail, going to Dornburg slooowly didn't help his cause or hurt Davout's. I see no reason to suppose he *should* have done something different that Napoleon expected.
Bill