Regarding KP, yes, it's a chemistry problem, and he lose his aggressiveness inside, I don't know what happen but because he has the skills to shoot outside, he seemed to forget to use his height to dominate the paint and score inside. We thought KP would be the next Dirk, but at the point of his career now, I think it will not happen.
He mostly takes his offense outside and forgets about the speed and height advantage that he got. Either he's more careful now due to many injuries or he's mindset is more focus on taking outside than to make a much higher percentage shots in terms of easy dunks of easy layup shots.
I see that it's still manageable since they already played together for a whole season. The adjustment will be on the coaching staff now.
Kidd needs to build good chemistry between players. Luka understands and able he's capable of adjusting both offense and defense. Role players are in need to follow that example from Luka, to jive everything inside the court.
He signed a huge contract with the Dallas Mavericks that will expire in 2024 according here.
https://www.spotrac.com/nba/dallas-mavericks/kristaps-porzingis-17832/Kristaps Porzingis signed a 5 year $158,253,000 contract with the Dallas Mavericks, including $158,253,000 guaranteed, and an annual average salary of $31,650,600. In 2021-22, Porzingis will earn a base salary of $31,650,600, while carrying a cap hit of $31,650,600 and a dead cap value of $31,650,600.
It's a huge contract so it's normal that the fans will expect a good performance from him, not only for the Mavericks to be in the playoffs, but to start winning again. Luka is the superstar of the team, no doubt about that, therefore KP has to support him and win together.