A Wales side, shorn of 27 players, suffered a 33-11 defeat to a full-strength Argentina side at Principality Stadium on Saturday.
But a number of young players were blooded over the course of the two-Test series with the Pumas and against Canada and Pivac believes this experience will stand Wales in good stead over the next couple of seasons.
“Internally, we’re very happy,” said Pivac.
“We’re happy 18 or 19 players have been exposed at this level of the game in about as many months.
“Even though that will hurt at times and players can get exposed at this level, they’ll be better for it in the future. That’s going to help with our depth and, as you saw against Argentina, our depth was tested.
“We had about 27 players unavailable. The autumn and this series has been what we needed in terms of the development phase.
“When you bring in a raft of new players, they’re not going to just hit the ground running against a team like Argentina who caused Australia and New Zealand problems.
“They are a very good side that are improving.
“To have the opportunity to play a quality side like that means we learned a lot. Some players put their hand up and did very well, but some players showed they had some work to do on their game.”
Next up for Wales is a hugely challenging and exciting autumn series at Principality Stadium against New Zealand, South Africa, Fiji and Australia respectively.
But Pivac is relishing the opportunity of taking on the world’s best sides.
He said: “We’ll go away and look at our depth chart. But when it comes to the autumn, we’ve got four very difficult opponents.
“There is no walk in the park in that autumn series. That will be about putting out sides we believe can get the job done on the day.
“We’ve learned we’re not as strong as we need to be in certain positions. We still need to be building depth and it’s how we do that with tricky matches to come between now and the Rugby World Cup.
“In certain positions – you’ll be able to work it out for yourselves – we’ve got a lot of quality and in other positions we’re a little bit thin. That was exposed.
“We will review the whole month. We’ll do that next week and then we’ll send some messages out to the players in terms of what we’d like to see them work on in their club environments.
“We’ll also talk to the club coaches to pass information on.”
