As much as I can without choosing the tactics myself.
He wants us playing further up the pitch with the opposition on the back foot. This prevents them over committing and feels that having seven outfield players to cover the defensive duties should be enough. He doesn't want our wide players tracking back and getting too tired. He wants them to reserve their energy for when we're on the attack. The midfield will do the covering and when and if they recover the ball will have three optional forward outlets instead of going backwards or sideways.
If you're right, that will be very interesting.
Every team I've ever watched playing 4-3-3 get their wide attackers to track back when they don't have the ball.
Chelsea have players like Hazard working their nuts off when they lose the ball.