I personally thought the Canucks series win was huge for them and showed me a lot. Winning without Demko and with Pettersson not at his best says a lot about them.
Nashville though is a team I point to when people say expand the playoffs. If I missed a season and you filled me in telling me that exact same Preds roster finished third to last in the league, I'd probably tell you that makes sense. That is not a playoff roster. No way anyone can convince me it is. Neither are the two joke playoff teams in the East, but I think we have to also say the same thing about the Preds. There were 13 real playoff teams this year.
A lot of people have taken the exact wrong lessons from that series.
Two extremely skilled defensive teams have an intense low scoring series? They must both be bad and anemic offensively.
The Canucks' (arguable) best forward and (also arguable) team MVP (when healthy) played injured? The team has no chance going forward
Hughes spent an entire round getting squished by Predators, an extremely heavy forechecking team with a tight system? Hughes is going to get even more squished going forward
Canucks are on their third string goalie? They're going to get ventilated by the Oilers, a team with real offense.
What I took from the series is that the Canucks are a team who can win a million different ways. If they can't score because they lost one of their most potent threats they'll drag their opponents down too, if they lose their goalie they'll collapse around their AHL starter and give him clear lanes to see shots from 50g scorers. Hughes got out of that hell series alive and I'm not concerned that anyone on the Oilers is remotely as tough or who forechecks harder than the Preds.
The reason that series was such a slog is because, largely, that's exactly what the Canucks wanted. They've been a team to score on high% chances with low shot totals all year, famously only shooting when there are multiple screens. This was a nearly perfect series for them, the Canucks gave Nashville the rope to hang themselves with. When the Predators began clogging up the shooting lanes and letting the team cycle, they began cycling below the goalie line, so the Canucks started cycling behind the net more aggressively which lured defenders away from the front of the net, the team had free reign of the netfront space. The Predators weren't able to get anything done in the Canucks' crease because there were always people parked there, and nobody could move Myers or Zadorov.