My gut feeling. Porzingis will play limited minutes IF this goes to Game 6 or dare I say, Game 7.
I think most people, and maybe even the C's organization deep down believes the C's can still win 2 of the next 3 and win the Finals in 5 games (or less). But if it gets dicey and goes to a Game 6, maybe they decide to let KP play for limited minutes? Game 6 is more than a week away.