Frank,
I have known Scott in person and I don't think that he is arrogant and combative. Scott is simply a very precise person (someone would say "picky") that cannot stand things that, in his own opinion, are "wrong", especially from a musical point of view. Please, consider that music is really the focus of his life and that, more than an arranger player, he is first and foremost a piano player. Maybe he is just fighting an impossibile battle, but he is trying to have inside an arranger keyboard the same degree of flexibility and musical perfection that he can have inside an acoustic piano.
I too sometimes have problems following what he writes, but at the end have to agree that he is right. People like me, who most often tend to accept things for what they are, will probably never change the world. People like Scott, who sometimes can give on someone else's nerves, are those that in the end will maybe change the world where we live.
Andrea