Really like your post. We play with a back 4 and our wide 2 should be defenders and not Wing Backs. We really need to train forwards and the mid field the art of man marking. You do not need to be taller or as tall as the player being marked. I refer to the Hearts game where their big centre forward was marked out of the game by our trialist CB
Your reference to Allardyce and Pullis is a valid point but they are recruited to get teams away from the relegation area and they do that by playing with 2 or even 3 holding mid fielders. This style of play secures the teams position but the football is a bit boring and inevitably they are moved on. Roy Hodgson is a better example of management but he is blessed with a couple of players who can turn a game on their own. My passion is watching a well drilled defence that can play the ball out. I think we may now have the skill set but the defence needs to work, not only in games, but also on the training ground. I like a high line with a keeper behind who can act as a sweeper if needed.
Most teams have problems scoring we don't so lets see what the defence looks like after working together as a unit and we get done with this cup group, I'm sure we can qualify