Re: Exercises away from the kit that work for you.
This is a pretty simple one that I think works for guitarists as well. It's just "table drumming" but you can do this on your legs if you dont want to annoy someone in the room.
Just tap your four forward fingers in sequence. First from pinky to index for a minute or so, and then in reverse. Switch between right and left hand. Once you get those going in a quick, powerful, even succession (dddrap) then shorten the reps between switches until you are alternating Right hand left to right, left hand left to right, right hand right to left, left hand right to left
Training your fingers to do this without stress or weight in place should give you l a little more coordination when you do have the sticks in your hand.