If you're going to play the long ball out of defence to that extent, you have to have a reasonable chance of winning it and holding it up - we do not have that ability with the current set up, and it tends to come straight back.
Very interesting to see the analysis of the Chelsea/Soton game (yes, I know it was Robbie Savage

) where Mourinho changed the style to a 4-4-2 at half time when they were one down. They were being stifled in midfield by Pochettino's setup, so he sent on Ba to partner Torres up front and switched to "hoofball". The result - they bypassed the congested midfield by going over the top of them and scored 3 goals to win it.
It can work, but you need the tools in the box to do it. We do not have them, and playing through midfield without the likes of Noone on the pitch out wide to take on defenders should be the way. If Cornelius plays, it could be a different story, but even if he could win and hold up the ball, we'd need to get forward a damn sight more quickly than we do now to take advantage.
I do agree about the apparent lack of confidence of Turner on the ball. Defensively he's a great stopper, but with the ball at his feet, he lacks vision.