I just hope his leaving was on an especially bad note. I consider one of the great strengths of the USAF that it encourages several high ranking instructors to work together. From my standpoint as a student, this has meant easy exposure to several senior instructors, Clyde Takeguchi being one of them.
I just hope that friendly interaction with Takeguchi's group will be maintained. Since such interaction by the USAF with Chiba's and Shibata's organisations is ongoing, I'll assume there's hope.
Unless some instructor has a grudge against you personally it really doesn't make much difference. I've never been in the USAF, but I've never had a problem training with senior USAF instructors. In fact, the first time I went to Japan in 1982 I went with Y. Yamada, even though I was actually a student of M. Saotome. I wouldn't lose too much sleep over it