I am not a big offensive guy but it seems like Koetter is still the "stretch in 1 dimension" type of guy where most of the NFL has moved on to a different type of system to cause conflict. When he first got hired all I remember reading about him is that he loves to employ the 4 verts concept. That only stretches the field vertically not horizontal. Most if not all NFL defenses know how to stop this, most of the modern schemes are designed to stop this, in fact this was the catalyst that got Belicheck and Saban to create pattern matching. So when watching Koetter it almost looks like he only has 1 trick. "My man has to beat your man if not play is dead"
Did you all forget Koetter's offense was full of curl/comeback that allowed DBs to ride the backs of our WRs? AND because the DBs right there with the receivers it allowed them to jump Ryan's passes. The deep routes take to long to develop and his infamous screens never worked. It was a MAJOR mistake bringing a guy back that runs a 90s Air Coryell offense and doesn't know how to make in-game adjustments. Remember that? It's more of the same thing when he was here before.
more at
https://boards.atlantafalcons.com/topic/4076388-koetter%E2%80%99s-scheme/