So when I first looked at the player before tactic (Barry) I immediately thought SS. That was at a glance at his attributes, I thought he would be a great SS or F9, that was just my inital thoughts and impressions.
Initially you say that you want a controlling tactic, which means by default you want to either control the ball or control where the opposistion have the ball. I am leaning more towards controlling the ball based on your tactical choices in your first tactic so it is a varient of total football you are looking to implement with a relatively aggresive press, movement from the front players and some level of interchanging going on. Playing a DLP(S) at the base is a good start, though I would change him to a (D) so that he holds back more and will be in a posistion to recycle the ball and probe for openings - Bowskin seems ideally suited to this role with his PPM's and attribute spread which is where you have put him already. You mention wanting him to move forwards, he will move forwards if the situation demands it as that is where he needs to be to control the game but he will always look to be in space to recieve the ball from a team mate.
As for the MEZ, he doesnt need to be left footed at all. Right footed will mean he can cut back inside for a pass or shot into the far corner. I would be tempted to stick him on an (S) duty to start with and see where it goes from there, the idea being that he moves into the half space towards the top left of the opposistion box as you attack. The W(S) on the left will push up against the full back giving him the room to operate. Im going to go off piste here and suggest Barry for the role. He will get forward into the box, playing one-twos to break the lines as well as having a good attribute spread for a player attacking from deep - those PPM's are outstanding for that style of play.
A CAR rather than a BWM. A strange choice perhaps, however the BWM tends to be like a labrador in the FM match engine. He will chase down the ball no matter where it is pressing and harrying despite it leaving holes in your defensive shape because its a ball, and he wants it back. Its his ball. A CAR on the other hand will be disciplined in patrolling the area, even moving across to cover for your MEZ if needed and will offer you a passing outlet on the right for your DLP and your players further forward as he plays with a bit more freedom than a BWM without the need to just chase down the ball all of the time keeping your defensive shape. He will also move forward to support the attack where needed as he has a bit more licence to do so.
Experienced Defender hit the nail on the head talking about the attacking two. Two creative players, who both want the ball and want to do things with it. You can just imagine them playing lovely creative little passes between each other making noises of utter enjoyment while the possesion does nothing until one of them loses the ball and sulks for a while. To combat this, I would play Harry Allen as an IF(S) or (A) depending on what you are doing with the striker. Allens strengths are his speed, strength and balance and his off the ball movement. He would be a threat in the air coming in at the back post, he could drop deep to help start a move then sprint forward to get into the box. If you think he cant play as a Treq due to his attributes, then I would respectfully suggest that a CF is out of his league as well.
This brings me to the star of your show and probably the player that makes me wonder why he was being played in midfield. Vladan Medic. This guy was made to play as a DLF or CF for me. All of his strengths are in his ability with the ball to do something with it for someone else or to make a goal for himself. His one real weakness is his lack of ability in the air, but that is made up for the way in which you are hopefully trying to play. He plays one twos, has great off the ball and vision, is composed with good anticipation and decision making all of which are great for a DLF. He can also dribble, shoot and naturally moves into the channels pulling defenders around as well as being strong and quick. Personally I would start with a DLF(S) and see what you think of the play. He should drop deep and link the play before moving forward, playing one twos with Barry as your MEZ or playing in the IF before getting into the box himself. With his long shots ability and takes first time shots he can be a danger to a goalkeeper from distance.
Because of Medic's height issues you might be tempted by low crosses however with Allen coming in off the flank mixed crosses is the way to go and let your winger decide based on what he sees happening in the box at the time. You are doing the right think by playing an attacking full back behind your attacking IF (assuming your striker is on support) as that will create an overload down that side creating space again for crosses or cutbacks. You dont need to use overlap, it doesnt work in the same way as you would expect in real life. What it does is boosts the mentality of your full back while reducing the mentality of the player in front of him slightly to make it look like the overlaps are happening. Hence why it isnt needed for an attacking fullback - he is already going to bomb forward so there is no need to reduce it even more. He should naturally push past your IF as the IF moves inside to be a threat with or without the ball.
As for the tactic as a whole, you could try unticking counter and counter press and just rely on your players to make the decision themselves about when to go and press. You are already using a higher LOE so they should press anyway. On a positive mentality they should counter if it is on regardless. You could use the same tactic with a defensive or balanced overall mentality as your away at the big boys tactic, using counter and counter press to try and nick the ball and score a goal to sit on while still aiming to control the ball as much as you can.