Great run by KD. It's great for the younger gen to have someone with his experience staying in the sport and leading by example.
It should be noted that the only reason he was rabbiting last year was due to illness and not being able to recover/back up after hard races and workouts. He still had to put food on the table for his family, so rabbiting some race was a way to do this and not something he really planned on doing. Keep in mind he rabbited the 100m at Pre to 800 in 1:45 mid, so he was probably in 1:44 high shape last year.....but he felt flat for days after it and decided not to run The US champs.
KD was coach by Johnny, but has been coaching himself for the last few years (still using the same system).