I compared Kozuka's QR LP with his season best from TEB. The programs are identically laid out. His TES BV (78.44 vs 81.54) is lower due to the UR 4T, but other than 4T and 3Lo, his GOEs for other elements are around the same or a little better than at TEB, ending up with a 88 vs 89.63 at TEB. His PCS, however is 77 vs 80.80 from TEB so he only broke the 80 mark once.
Without seeing the performance, it's hard to tell if the variation, especially the PCS, is due to his performance or the judging, to give us an idea of how the judging may go in general, strict or generous.
Maybe they try to balance out the Special Ice bonus. However, the GOEs don't suggest that. It's the Tech Panel that lowered his TES.
Kozuka, however, may still bring his best in the real competition.
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After seeing Kozuka's performance, I would say, for a similar FS in the LP, he will get higher PCS. This routine was "almost" as good as it gets, he has not looked tired at all towards the end and his last jumps looked as easy as the first ones in the first minute. Except the quad, there is not much he may improve on this program, as far as execution is concerned. I would say he could get between 3-5 points more in total, would he skate like this in the last group in the competition.
My assumptrion is the judges had no reason to throw out those high generous PCS at this stage of the competition. What for? To make him beat down the field with not 28, but 31 points? Who cares?