If you like the stem - try lightening the load on your hands while you're riding. I just got a WSD and they had to cut the stem tube down to fit me and yup = she's Really Responsive now! Squirrly as a matter of fact (all her of course....Never the rider!) I've noticed that when I "unweight" my hands she settles down....I think of it as easing off on the reins!
Life should NOT be a journey to the grave with the intention of arriving safely in an attractive and well preserved body, but rather to skid in sideways, champagne in one hand, strawberries in the other, body thoroughly used up, totally worn out and screaming: "Yeah Baby! What a Ride!"