You're right the full backs are a problem but even if we get new players there Dyche isn't going to have epiphany and it's cool for them to bomb forward at every chance.
In his system they are deep and narrow.
The thing he drums into these players is don't get caught ahead of the ball.
They're terrified to take a chance, do something different. It's why we don't score from open play (or at all).It's mainly set pieces or recycled set pieces.
Our defensive shape is good, our attack is pitiful.