Too soon to tell, but at least the Habs are at the point of the rebuild that you can envision a number of guys playing important roles on a contender.
Caufield, Suzuki and Slaf all look like they can be top-6 caliber guys on a contender. Caufield's scoring is down, but he's still shooting a ton and he's been a better playmaker and better defensively. Suzuki is back to playing great two way hockey and his hockey IQ is shining through. Slaf's growth has been impressive and the fact that he's shown the growth he has gives one optimism that he can continue to refine his game, because if he does then he'll be a premier big body winger in the NHL. I'm not as high on Guhle as some here, but I think he'll be a good 2/3D in the NHL.
There's guys behind them to fill spots as well. Dach is frustrating because of the injury and how he may return from it, but he was flashing high end growth in the preseason and game 1. Newhook is more of a work in progress, but with better linemates (like, say, Dach), he looks like he can be a strong middle 6 winger. I really like what I've seen from Roy in his short time up in the NHL, I think he'll be a really good middle six winger too. Xhekaj, Struble, Barron and Harris have all shown flashes and all are really young too.
Montreal needs at least one more top line caliber forward and need a true #1D. But Montreal has good picks, good prospects and will soon have cap space to work with so they can draft, develop and/or trade for those guys. This isn't in years past when the best Montreal could offer was Ryder, Halak and a 2nd. Montreal has legitimately good trade pieces if they want to go big game hunting and cap space to work with starting this offseason (and even more the next).