Obviously the odds are against him being as good as DD but SPence has played the "true #1 role" everywhere, all minutes, all situations. He's never been a specialist. I can see him as Voynov 2.0.
I get this exact same vibe as well. He's a tad smaller than Voynov, but I see more skill there. Not incredibly fast but very mobile, and he has two things that I think were Slava's strongest suits: poise with the puck and a great stick.