Fans are elevating him as a no1 dman, but he's not that yet. Can he become one, sure but he wont be a top and complete 1D like Hedman or Josi, or an offensive one like Makar or Hugues. He most likely will be a top tier shutdown guy.
He still need to become stronger (get push alot) and get better balance overall. His play reading is good, which will improve, and with his speed, that will make it a hard guy to go around.
That being said, he wont put crazy numbers, at least for several more seasons. He's mindset is set to D not O and he's not taking any risk. So he either needs to be paired with another very strong Def Dman to be freed up from that responsibility, or he'll need to mature into that role overtime.