3W-1-3-3(ST) Lineup Questions From Newbie

Just getting started here. Team is 4-0 in the early going, which surprises me since I'm so new. My best players line up in a 3W-1-3-3 manner, with no attacking midfielders. Only flankers on D. Seems to be working so far, but should I be concerned about the 3 Striker lineup?

Also, with this lineup, on my team settings I've put defensive mentality, press in own half, zone marking, and focus passing through the middle(the latter because I've got 4 star players right up the center (DC,MC,ST) and no offensive flankers). Any thoughts?