The reffing was objectively dog-shit this series, and favoured the Preds. Nashville played a dirtier, defense-focused game and spent a lot of time in their zone, with a couple of the earlier games completely tilted against them.
And yet, the powerplays this series were 22 to 13 in favour of the Preds. That is unmistakably biased, and it damages the NHL's brand imho.
In comparison, the EDM - LAK series (which saw the offensively gifted Oilers cave in the Kings) resulted in a much more logical 20 - 12 PP advantage to the Oilers.
The refs really do have it out for the Canucks, and it kind of sucks.