Heinen has always been a smart player and always had a bit of offense in him. I think the Heinen skeptics, understandably so, were basing their evaluation of Heinen this pre-season on his previous time in Boston and hadn't watched him much post-Boston. This comment by Heinen pretty well sums up the difference between his first stint with Boston and where he is now:
“It hasn’t always been that way, but I think I rely on my stick a lot. I think maybe too much in the past, but kind of trying to get better at getting body position, getting my body in there and then relying on my stick to win it, So, a little bit of both there and something I keep on trying to improve on.”
He was using his body a lot more with Pit than before when he was a B. He was going in with his body during board battles rather than standing a couple feet away and poking around with his stick. The softness reputation he had during his first go with Boston wasn't inaccurate. Contrast that with 2023 when he is winning board battles and has been first on the scene twice in one week during shenanigans after the whistle.
He seems more confident now and doesn't shy away from physical play like he did in the past. He still might seem too soft for some (he's never going to be a banger), but as Monty pointed out Heinen is winning 50-50 battles 64% of the time. That's damn effective for an NHL player, physical player or not.
Having said all that, Heinen is still primarily going to thrive in the bottom 6, while playing a game here and there in the top-6 when the need arises. One great game in the top 6 against the Sharks doesn't mean he needs to be a permanent fixture in the top 6. Ideally the Bs would have a better option in the top-6, but given the cap situation Heinen might end up shouldering more games in the top-6 than what would be optimal. It'll be interesting to see how he does against non-AHL competition across multiple games in that role.
@Absurdity summed Heinen up well when calling him a chameleon.