[Hurlburt88]

Hard to prove, but my logic says multiple quarterbacks hurts us more than the defenses prepping for us. 
-  Offensive rhythm, snap count timing, pass timing, etc. compromised
-  Lack of reps in practice as a starting unit
-  A firmly rooted starter can still execute game-plans with different twists
-  My clincher:  many many very smart coaches have bypassed this approach.  Doesn't absolutely "prove" my point, however is good enough for me in addition to the above points. 

[Hurlburt88]

Hard to prove, but my logic says multiple quarterbacks hurts us more than the defenses prepping for us. 
-  Offensive rhythm, snap count timing, pass timing, etc. compromised
-  Lack of reps in practice as a starting unit
-  A firmly rooted starter can still execute game-plans with different twists
-  My clincher:  many many very smart coaches have bypassed this approach.  Doesn't absolutely "prove" my point, however is good enough for me in addition to the above points.