Yeah Beach, I'm out of shape but not that out of shape. 
Despite appearances, progress is still being made. In the last few months I've cleaned up my grip, which has helped my clubface control, and established a consistently positive club path. I'm hitting the ball higher and my right-to-left shot cone is quite a bit tighter than my left-to-right one ever was. Now it's really about adding speed -- cocking the wrists faster in the backswing and recocking them faster into the finish, getting the right elbow folding faster to keep it in front of the shirt seam, getting the arms as a unit swinging faster in general. My hip speed is fine, as are my kinematics overall I'm told, although my curve is slightly right-shifted (i.e. peak speed is at impact rather than slightly before, as the model would prescribe).
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None of this is meant to sound defensive. Just saying that I've now been working on this long enough to understand that there are precious few quantum leaps. Even when you clearly understand what you need to do, the actual application of that knowledge is an incremental -- and often frustrating -- process.
But hey, if it was easy, it wouldn't be interesting, would it?