I love the KI, and an Otsu would be a great fighter for sure.
It just can't push initiative and that sometimes gets really really annoying when if you are in a K4 or Dora or Tempest or U4 you can control a fight better. The otsu will suffer from the same drawback. . . and really. . . the 20mms on the Ib is already a saw, I never feel like I need more firepower (more bullets sometimes?)