Redundancy in small unit organization

[William F. Owen]

Rifleman: If I'm reading "The Infantry Rifle Squad" correctly, Melody's work is essentially a lit review and he arrives at his conclusions and recommendations deductively; the same can be said of his student Timothy Karcher in "Enhancing Combat Effectiveness."

I just printed this out and read it in my lunch hour. To summarise,

Karcher believes the 11-man squad is better because it can take more casualties, and has more firepower, compared to a 9-man squad. Thus More men is better, when it comes to redundancy and weight of fire.

Would 11 man squads mean an SBCT Platoon would need 5 vehicles to carry everyone, not 4?

...and this took 89 pages to explain in support of an MA Thesis?

Am I missing something?