Agito, Faiz and Kiva all have the same writer. Yet Faiz and Kiva are a step down from Agito.
Ryuki and Den-O both have the same writer. Yet Den-O is a step down from Ryuki.
Kabuto was full of veteran writers, yet none of them could write a coherent story around all the merchandise-driven stuff in that show.
Maybe Sanjo is competent enough to continue writing a quality script despite more obligatory merchandise-plugging. I doubt all of this was his idea. But given the past, there is good reason to have doubts.