In the frontal assault right up the center into a dug in position, yes. His left flank, however, wasn't as muddy, and conducive to his usual tactics. He would then have been in a perfect position to route the reinforcements arriving from the direction of his right flank later in the day as well. Hougemont was a tough nut, but he only had to screen it, not take it. But all in all, Wellington set up a brilliant defense, and Napoleon should have chosen not to fight it out there; he didn't have to, and his mistakes were inexplicable, like delaying his attack until his entire army was arranged along the front, losing precious hours for a pointless fashion show. Definitely not his best moment.