In "Hands, Grooves, & Fills"
, I address this with a series of Bass Drum rhythms that improve not only independence and coordination, but timing, accuracy, and phrasing. The rhythms are accompanied by live band "Play Along" tracks to help with your feel.
Putting ostinatos with the hands over these rhythms really helped me develop these skills.
I also practice with my foot on the floor to develop consistency of motion and timing. I use the ball of my foot and lift from the knee, pushing off and returning to the floor in one motion. This is shown on the DVD as well..
Hope that helps!
All the Best