How about the fact that they are loud. Pulling the arrow through them is way to loud in my opinion. That, coupled with the speed loss and the bulkiness is the reason I chose to get rid of mine. I believe that if a person would go to a dropaway they would never think about using a WB again.
This has been discussed at length here too, and it has been found that some arrows casue more noise than others. I went from the original WB to a drop away back to the new WB. Not dissapointed!