You worry about injuries works best with a run/throw option. Seattle sprinkles in some flex plays. Agree a wish bone package would be something a defense would have to spend valuable game prep time to prepare for. Work like magic when it first gets unleashed with out no film on it. Film league. For example the SP suspension year. All pre season they running the shannahan traditional zone read bootleg pass playbook. Season opener they unleash the Baylor spread on us. Now we were not very good but they would have hung 40 on anyone that game.