So I'm not very experienced so take my input with a grain of salt. You currently have no players in the defensive midfield, your bwm(s) will run around trying to press the opposition and your ap(a) will be getting into advanced areas when in possession leaving space behind. This will leave a lot of space in your midfield for the opposition to exploit. I would look at changing at least one (maybe both) of these two into a holding midfield role. Someone that will hold position and provide some defensive cover.