Last years team also really wasn't that spectacular outside of one monstrous and record breaking win streak. Mediocre(and worse) teams have done that before.
Regardless it's early and this team is seemingly improving despite being down it's superstar goaltender. Nothing to be overly worried about.
Last year's team was a possession monster. This year's team... not so much. The raw D is one of the problems - along with non-Elite goaltending. Offensively, they don't cycle like last season either.