I have to agree with WJ, your midfield (or lack of it) is likely to get overrun. Your only MC is roaming and will not provide much defensively, and a BWM is not as defensive as you might think. You basically have a defence and an attack. No midfield.
Read the pairs and combinations guide I linked. You'll find stuff like this in there: "A pairing traditionally has a “sitter” and a “runner” ... A Ball Winning Midfielder, a defensive role in nature, does not provide disciplined positioning, so makes a poor “sitter”."