Now do Kadri
again here, you are making the very point you seem to be arguing against...
a player has progressed, as you point out, from his first three to his last three years...
same player has, this season, further jumped his production (and by a relatively small amount, .39 to .5, not exactly an unsustainable increase).
same player is now moving to one of the best offensive team in the league, one with perhaps the most mobile and offensively inclined defense groups in the league...
and you think that this will require "4+min more a game on PP" to see him match the ppg pace he's put up this season, the bulk of which was under the DD black hole... lol
Just playing for the Avs is quite likely going to increase his ppg productivity by .5ppg or more... projecting that he'll only rise to .42ppg completely ignores the very impactful context/roster differences that are at play, not too mention that the improvement curve doesn't follow that neat distribution...
You seem to be ignoring both the impact of roster context and the question of whether he also improves his overall play, which is not at all unlikely or unreasonable for a player in the middle of his prime athletic years (especially one with an impeccable work ethic and who has displayed the skill set/tools to be more productive).
cut it however you want, it would be a FAR bigger surprise to see Lekhonen stay or drop in his career PPG pace over the next 3 seasons... that's far more unlikely going forward, barring injury, than seeing him match or improve on his productivity this season in his new environment.