Sore wrists and hands is a sure sign that your saddle was too far forward. The proper fix for that is moving the saddle back, not using a very small saddle to bar drop.

The bend in your leg at the bottom of the stroke should be closer to 30 degrees, not 10. The angle of your foot affects the angle greatly. Most cyclists pedal with the heels up by some amount. If you clip into the pedal and set the saddle height so your foot is level and the leg fully extended at the bottom of the stroke, all it takes is a 2-3cm rise of the heel, while pedaling, to create that bend at the knee. Of course, if you pedal with no heel rise, then you'd lower the saddle from that starting point, to create the knee bend.