Skipping the Fish Feed was stupid
One of the bloodiest battles in the area since Aegon's destruction of Harrenhal. More than two thirds of the men who rode south with Roddy the Ruin were either dead or wounded, and the Lannister forces were decimated in the thousands, and the death of Jason Lannister. It explains why both the Lannisters and the Winter Wolves are so depleted by the time we see them later in the season; most of the Wolves were effectively spent by their first appearance.
There has been no mention of Kermit or Benjicot. It would be crazy if the show leaves out "The Lads" entirely, considering they were the primary fighting force for the foot soldiers and served as the backbone of the war effort throughout the conflict. They are also some of the coolest characters of the whole damn war.
There's a whole subtle war going on between the Blackwoods and Brackens that the show hasn't even acknowledged outside of that one scene in season 2. The Dance was just another convenient excuse for these two houses to kill each other.