I think you are right.
Personally I would go back to basics if I was Martinez. He obviously wants to play with wider expansive full backs and central midfielders who fill gaps in defence.
I would prefer us to push Baines-Coleman into midfield. Garbutt on one side with Browning/Hibbert on the other should allow for our back 4 to play closer together and be more robust. I also think it would be harder for teams to stifle Baines/Coleman if they had more of a license to attack.
I also think this was you can get Barkley playing in a deeper midfield role, without as much responsibility to have to fill in gaps. Probably alongside McCarthy on current form.
Then it's any two of Naismith/Lukaku/Eto/Kone/Mirallas up front.
That's what I would change it too. A more simple game plan with defenders picked to defend and midfield players (central) who have an emphasis on being creative as well as just filling in holes left by the defenders. Sides have worked Baines and Coleman out as fullbacks but it will be harder to do this if you give them more attacking license.
Barkley needs to play from deep. His game is based on getting the ball from deep and running with it. The opposition hate that.
I agree on the wing backs if thats the way you want to go.
But my winger thing is a viable plan A or plan B.
We need more movement and quality on both flanks. With pace.
A lot of people criticise for lack of plan B. If the opposition start pressing Baines/Coleman you need to counter this with a pacey winger on each flank to drag players all over and a slight formation change
This then keeps Coleman/Baines in the game and gives them the opportunity for overlaps and takes the pressure off them
At the moment Mirallas is injured and Mcgeady is making stupid errors and isn't focusing properly. Pienaar lacks form.
We are short on the flanks. Like Delafeou