I'd have him at number 3 behind McDavid and MacKinnon. Just personal preference over Matthews and Draisaitl who are in the same tier.
I'm happy Barkov and also Forsling is having success. Maybe people will start noticing how defense still matters, even in a league were scoring is up, the playoffs are a different animal.
Every playoff series is like a new mini season, and all those little details that doesn't always translate to points matters.
There is a reason why teams built around the likes of Bergeron/Chara, Toews/Hossa/Keith, Datsyuk/Zetterberg/Lidstrom, Kopitar/Doughty, O'Reilly/Pietrangelo etc have success.
You can also see it in Edmonton. This year, up until the finals, they have actually played good defense. McDavid is also a improved defensive player compared to the first 2-3 times he was in the postseason, and now they've made it this far.