Bill,
The right side compression (between hips and shoulders) is an action..
Muscles only work one way , i.e. they contract and relax, therefore once a muscle has contracted (left side on the backswing) all it can do for the opposite effect is relax, which generates no power at all, apart from letting the opposite muscle (the right side) take over...
So yes, nothing on the left side is generating the turn towards the target, it is ALLOWING it (the right hip to transverse around the left hip once the left side is posted)....
Re "from the ground up, feet and knees"...at this stage (weight on the left side) you have already included that....
Ref right heel coming up before impact...well there are two schools of thouhgt on that one, but the only working difference should be that in one you lift (the heel) and in the other, you roll (invert) the whole foot...the weight shift should be the same for both......you may find, in your case, that you are bending the right knee too much, which is forcing the left heel to come up in order to maintain your swing center height