The coach played Scheifele (and PLD and Connor) more down the stretch, after his critique of their play. I'm not sure how that's consistent.
Scheifele lacks awareness and skill defensively, but I think the narrative about his lack of effort is overblown. Watch Draisaitl play and you'll see plenty of shifts where he cheats offensively and doesn't bust it defensively. Same with MacKinnon and a lot of top offensive players.
On the Jets, no forward has been more inept defensively than Connor, but he rarely gets criticized, and certainly not to the point of running him out of town, and yet he makes well above Scheifele in salary.
Regarding Bowness, I am not sold on his coaching system or style, period. When he clashed with Scheifele, it was about style. Bowness likes a dump and chase, and at that point he just wanted more shots. Scheifele plays a more possession game, so they clashed at a time when the team stopped scoring (despite increasing shot attempts and expected goals, overall). Note that he also didn't like Ehlers' "east-west" style, and pushed him down to 3rd line minutes late in the season. I thought Bowness lost the plot, and I'm concerned about his coaching as the Jets try to bring in more skilled, possession players like Perfetti and Valardi. Bowness will want them to play like Saku and Appleton. Note that in the last 35 Jets games, Ehlers got less ice-time per game than Appleton, while Scheifele, Connor and PLD had their ice time increased down the stretch (funny way for Bowness to show his disgust).
I predict that fans and pundits (and players) tire of Bowness' approach in the next season or two. I'm already losing confidence.