I really do feel they’ve done a nice job on this. The LP was excellent. Yes, they cost more, but I feel it is justifiable as clearly a lot of care went into them. AND, one of these tracks has been 100% MIA for over 60 years, so that is also some serious sleuthing.
I have read that Kiyoshi's death was sudden and unexpected.
Ken Peplowski's cancer was in remission. It has been reported that Ken suffered a heart attack and died in his sleep. Chemo does stress one's heart, so having a heart attack is not really "unexpected". It is a possibility which unfortunately happened to Ken.