It is futile. All significant changes in SGI come from above. Try to change the distribution of Nichikan Gohonzon to Nichiren Gohonzon. Try to change Nam Myoho renge kyo to Namu Myoho renge kyo. But if mentor says "change" [regarding anything big or small], it's changed within a day. Another reason to not work to change SGI from within is that Nichiren teaches that we should not associate with slanderers.