Like in real life football, the one thing that works in the 15.2.0 patch regardless of the tactics you use, and the club you play, is that the opposition defense and midfield lines HAVE to be separated by your passing game, otherwise they will block you a lot. The closer those two lines are, the smaller your chances are. Try to think of your team as two units: the building/passing unit and the finishing unit. The building unit (defenders, wing backs and midfielders) will have to play possession football and the finishing unit (wingers and/or strikers) will have to make runs or stay in advanced positions. The ball has to reach the playmaker and he has to pass fast in space for the finishing unit. If you try and build a passing game all over the field, when you get in the last 20 meters, right outside the opposition area, they will create such density, that your passes and shots will be intercepted very often. I think that in 15.2.0 patch, this kind of passing works better than the short passing game that worked in previous patches. I am still testing this, but you might want to try it too