I think any windshear procedure will inevitably be generic, and may prove a bad procedure in some cases.
I think that the whole idea of the stick shaker procedure is to try to minimize height loss while the windshear is worst. If you fly at lower and more efficien aoas you will lose altitude. Maybe the windshear will not last enough time to make the altitude loss worth it.
When the windshear finishes, and it always finishes, the airplane will fly at any angle of attack. But if the windshear is long and strong, it could be worth flying at the optimum aoa, or even retracting landing gear...