I fully agree with that review
especially after the plotline where they revealed that one of the boys was in love with Hiro (and that that was why he couldn't co-pilot with girls), then in the same episode, threw his inability properly to co-pilot with pistils (girls) out in favor of him for some reason being able to successfully co-pilot with his new " cuter" loli-esque Pistil, same with his ex co-pilot who was in love with Ichigo, and couldn't properly co-pilot with Stamems (boys), then, again, just magically gets over it after being re-assigned to a new boy
they even went so far as to make mitsuru say he wanted to pilot in a Stamen/stamen pair
before the show later confirms that's impossible