I think the problem with our midfield is that the players we have don't have clearly defined roles that they are there to carry out.
Think about some of our best midfields in recent times, for example Eustace/Bryson/Hughes. Eustace would sit in the front of the back four, mop up and play simple passes. Bryson was the engine who would also be making late runs into the box and linking with the wingers. Hughes would play between the lines and look to spray passes around.
They worked together as a unit. You see the same with all the best sides, whether they play a two or a three.
What do we have now? Bird who sometimes sits back and sometimes plays almost as a 10. Hourihane who plays deeper than he used to because he doesn't have the legs to play his old role. Thommo, Fornah and Smith who play different roles every time they come on the pitch, mainly from the bench.
I'd go as far to say that none of them suit the CDM role naturally and all of them are asked to play there.
I'd like to see us bring in a player who can sit in front of the back four and turn over the ball. Then see Fornah or Thommo play as the midfield engine driving the ball on, and Bird or Hourihane playing between the lines.
It's all square pegs and round holes at the moment.