Hey all,
So I am getting very little response from the Afterlife, then it comes on very strong as I near the max turn of the potentiometer. Same goes with the volume.
If you're happy with the amount of compression you're getting (bearing in mind that it's a fairly mild compressor overall), you could use a different taper for the potentiometers. You could use a linear for both, or even a reverse log for the compression control.
Check your resistor values, specifically R6 (make sure it's 330 ohms and not 330x).