I wonder which Yonemura we'll get here... Yonemura from when he's a main writer for Kamen Rider or the Yonemura usually seen when he's a secondary writer for everything else?
Rider Yonemura is basically: "Try to throw as many things as possible on the script, all related to the main story, even if some stuff ends up unused in the end" and "make the main character evil (or seemingly evil) by his own choice at some point". Sometimes, it seems like he's trying too hard, but at least he's trying to make some stuff that stands out. Maybe one day he'll get something perfectly, but I still generally enjoy his flawed works.
Meanwhile, secondary writer Yonemura usually just does mediocre or average stuff that tries to feel like what it's expected to be, without any touches of his own (aside from some inconsistencies sometimes...).