The way the plant is turning purple tells me that he has supplemented the K, also that night temps are swinging by around 15F. The yellowing , the P. Chances are that the P&K supplement are a high one. Not totally a problem but, I would not have added so much P. The plants potential would have been better served by less. The high K is not so much and issue. Amended K for expressing color in the plant can be done and not hurt the plant. The K use here is not bad.
The trich structure hints that a Mg and S supplement may have been used. The use of something like a "Sweet" will increase trich production.
The overall look of the bud structure (swollen calyx's and the totally brown pistils) say this is running to a proper finish time (longer then breeders report).
They look good! Personally, I would have used a bit less P but, that's all really.
Well done.