There are several reasons for the abberations which have crept into the SGI's version of the Daishonin's Buddhism:
Except for Makiguchi, the SGI members have not experienced martyrdom. They have had a relatively easy go with propagation and have, on occassion, even resorted to bullying tactics themselves, something someone who has experienced severe persecutions first hand would never resort to.
Others reasons for the abberrations, are the "way of the Samurai" and Bushido (way of the warrior), remnants of the retainer/lord relationship, the idea of saving face, and the Zen Buddhist master/disciple realtionships.
One of the most horrific digressions from the Way of Buddha and Nichiren Daishonin is the zennification of the SGI. The Buddha stated: "be a lamp unto yourself" and the Buddha as well as the Daishonin taught that we should base ourselves on the Law rather than on persons. It should be fairly obvious that the admonishments to seek guidance in the SGI and going so far as having a Guidance Division is actual proof of these distortions. Those who embrace the highest Law and the Supreme Object of Worship, need never be exhorted to seek guidance and develop what is virtually a master disciple relationship with anyone who is deemed a senior in faith. Even President Ikeda falls into the category of person. In Zen Buddhism too, whatever the master says is followed without hesitation or question. Such zenlike warrior irrationalities such as, "Follow no matter what" or "'if you sincerely follow the guidance of your leaders, even if they are wrong, you will gain tremendous benefit", are common SGI teachings. This is based on Zen and Bushido, not Buddhism
Even if the SGI were to superficially adopt the Object of Worship of the Original Doctrine and admit that the identity of the Original Eternal Buddha was Lord Shakya, I feel that it will take many generations to purge the SGI of the Way of the Samurai, Bushido values, the way of lords and retainers and the insidious teachings of Zen.