This is one of the huge disappointments. Kikuchi was not cheap he is locked on for 4/39 with 4 year club, or 1-year player option. If he was looking like another at least Marco G level player:( that is a guy you can count on to be at least a 2.5 WAR starter #2,#3 ) then you could say good investment. But now he is basically last couple years of Felix. Maybe he needs to be BP for a while or sent to Tacoma FFS. The other rotation guys: Not many really thought Felix would rejuvenate himself, LeBlanc the savior,,not.
Position players: Mallex probably is a leading candidate for biggest disappointment. Tim Beckham, especially after the hot start. Seager and Haniger with lengthy injuries. Dee is not having a career year.
They need to do something about Kikuchi now. I think sending him down to Tacoma or the BP would be a good start.