When Bret Hart was face of the company, Vince booked him to his strengths not Hogan's. The same took place with Austin because each person is different and, lo, and behold society took to him.
Jim Cornette says pro wrestling is dead. It is an entertainment company now which spells an uphill battle for one Roman Reigns.
This is why the booking system being used for Cena is now being applied to Reigns. This is bad systemology, however, because being human isn't so rigidly defined.
Society can dictate what is popular not a system. Austin was extremely popular for reasons that went against Vince's tradional system.
Each babyface eventually had to sell out and crossover. Reigns biggest problem could come at this point. Until then, WWE shouldn't anticipate so much. Book Reigns like a man, because it isn't truly fair to book him otherwise.
Roman Reigns can't cater to a demographic of 0 - 90 including both males and females. However, he could explode the demographic of 12 - 49 if he catered to mostly them.
Then again, WWE has painted themselves into the proverbial corner as usual. They are all quantity, less equality instead of a relatively decent mixture of both.