The Highlanders' 10-point win over the Blues last month demonstrated what they were capable of, essentially winning the match in the first half hour by racing to a 29-0 lead.
And a similarly intense level of play in Saturday night's opening stanza blew away the Hurricanes, leaving Joseph wondering where that level of performance had been hiding in the first three months of the season.
"It's obviously been a disappointing season for the team," he said.
"But one thing I'm really proud of is that - I took a question prior to the game about where the team finds motivation - when you've got experienced players they have a lot of personal integrity and personal pride, and I think you saw that come out."
Of course, it came too little, too late for the Highlanders' season. Something else on display on Saturday night, and evident throughout the campaign, was a lack of discipline, which looked set to sink a win.
With 22 points of breathing space in the second spell, persistent penalties from the visitors added up and Aaron Smith was sent to the sin bin.
The hosts responded with two tries to leave the Highlanders vulnerable, and that was exacerbated when prop Bronson Murray earned his side's competition-leading ninth yellow card.
"We've got to sort that out, it's been plaguing our whole season," Joseph said. "You saw what happens when you lose a player and have 14 against a strikeforce like the Hurricanes. I don't know how many points they scored but it looked like they were going to come back and beat us."
But the Highlanders held on, sparing their coach further frustration in a season full of it.