It's to be expected. They are a top possession team, maybe the best in the league.
If they had a superstar finisher they would win a cup right now
Carolina is a talented team, but they're probably the only NHL contender who got appreciably worse at the deadline. I'm not sure what they're thinking over there, because anyone who knows hockey can see they need a #2 center but they're still deluding themselves that Jesperi Kotkaniemi is anything more than a checking liner. The Gostisbehere deal was, well... so awful it has to be considered funny. He's essentially a power play specialist you need to constantly shelter at 5x5 so that his frighteningly weak defensive game does not get exposed. Puljujarvi is a decent player, and that was a solid add, but we're not talking an impact player by any means.
Again, I was baffled by the Carolina deadline. I strongly feel if they added a 2C like Ryan O'Reilly or Bo Horvat, then a Bertuzzi-type for the top 6 and a defenseman who actually plays defense -- well, it might've been enough to be one of the top 2 or 3 teams in the league. But now I can't see them beating the Rangers or Devils in a 7 game series.
So no, Carolina is not a finisher away from a cup. I'd say they're a defenseman, a top 6 winger and a 2nd line center away from being better than the Rangers or Devils, much less the Bruins or Lightning. Don't get me wrong, the Hurricanes are still dangerous -- they're extremely well-coached, they have a solid bottom 6, some star power at the top of the line-up, and one of the best top 4 Ds in the league. But this is a team with just 4 top 6 forwards (Aho, Svechnikov, Teravainen, Necas while Jarvis is still getting there), and probably the worst 3rd D pairing in the Eastern Conference playoff picture. They have a 3rd line F playing on the top unit in Puljujarvi, and a center who is maybe as good as McLeod or Haula centering their 2nd line. It's tough to see them getting out of a brutal Metro division in this year's post-season.
I've watched a lot of Carolina this year, as they were the team which scared me most in the division. I think they live and die by their foremost strength, which is that Slavin/Burns/Pesce/Skjei is as good of a top 4 D as you'll find anywhere in the league. But I have to wonder about who is making the decisions in that front office which really hurt the team's chances at the trade deadline while pretty much every other Eastern contender improved remarkably.