I understand your reasoning, but one less player on our 53 would hurt. With our medical issues year in and out I just can't see wasting a spot for our 3 QB. Emergency in game situation where Carr gets hurt and then JW as well, Taysom would come in. The next game would be a different matter.
We ALWAYS have guys on the 53 that don't play. Stashed players and other weekly inactives. With the new practice squad rules, we can keep plenty depth. As much as anyone else can.