mss100

If you are concerned about defensive solidity perhaps keep the BBM (his running from deep is valuable in such a system) and offset his aggressive nature with a IWB-D on the left side. Would provide a better rest defence - you would still have enough threat going forward.

Only PI's are on the two AM's (Stay Wider and Roam from Position). This increases their likelihood to drift wide, support the wing back and make a diamond with the WCB's and CM. It works nicely and produces a 2-3-5 or 3-2-5 in possession, stretching the opposition backline.

How is the counter-attacking play? Is the defensive shape good?

That tactic is good. can't see any reason why it wouldn't still work. The only problem is... that striker doesn't seem that good. He's not bad, but I can see why he misses chances; one in off his bum and you'll be fine. I play something similar as Atleti; Mitrovic is v good in this system.

Nothing jumps out as incorrect. Perhaps you can be more adventurous on the RHS with the WB or RM. The only other consideration is how fast you look to move the ball (extremely high tempo doesn't ensure you move the ball really fast, they will rush and make mistakes and play will break down if not good enough). Players will try and move the ball very quickly; add to this you have 'Counter' selected, your strikers could become isolated if your supporting players don't have the necessary attributes (Pace, Work Rate, Teamwork etc). I would simply go down one notch to 'Higher Tempo' and have a right-sided player push further up. If this is your first time playing the system, I would remove PI's until you are sure you want them. Watch a few games and perhaps you will want your DLF staying wider or BBM moving into channels. Remember the DLF will move into the channel and the BBM will already roam around the pitch, supporting the play. Good luck.