I don't remember Steph not wanting to come out. Though I get why with only 6 minutes to go (which, from memory, was about the time Kerr pulled him). Kerr has been playing around with the rotations in the last few weeks, which I assume is to spark something. Steph has gone from playing the entire third and then coming back with 7 minutes to go in the 4th. Kerr has swapped that to coming out with 4 or so to go in the 3rd, and then playing him to start the 4th, subbing him out when Durant comes back in for a couple of minutes, before finishing the game.