Another mental thing that will accelerate your progress.
Seems right now, you spend all your energy just hitting the ball. That is noble, but there is no use hitting the ball without a specific, preconceived TARGET! When you hit, you specifically hit DTL or CC, against the ball machine. You get plenty of practice hitting up the middle when you hit with a live partner. Hitting to your partner is the worst practice you can have, as every player plays the way they practice!
You can't help hitting BACK to your partner, so practice those wide shots against the machine, and against 2 other players.
Remember, WHERE you hit the ball is just as important as HOW you hit the ball.