That was my observation as well, it's almost like the guy is closing his eyes before releasing his pitches as he generally has no idea where his fastball is going to end up. On one pitch he'll miss several inches up and off the plate to his arm side, then on the next he'll groove one down the middle etc. Constantly falling behind makes it tough for your secondary pitches to be effective as hitters can really key into looking for pitches to drive.
Kikuchi's heat maps for 2021 show far too many middle middle meatballs, he's going to need to really iron out the command if he's to have any kind of success. Could this be a result of not being able to grip the baseball? This is more of a casual observation as I don't know how to break down heat maps over time, but but after the sticky stuff crackdown his results really cratered. How much of this is due to the stark loss of spin on his pitches vs poor location is an interesting topic.