He played 11 tests in 2013 but only three last year. There's no doubt the return of Kaino from Japan hampered Luatua's opportunities in the black jersey, but he was also put through the conditioning wringer by coach Steve Hansen after coming up short in terms of fitness and work rate. Hansen's comments to that effect would have hurt, too.
In announcing his decision to stay in New Zealand recently, Luatua said a major factor was the All Blacks.
"I've had a taste of it, and it's one of those things where you just want more.
"I don't want to be a sometime All Black. I want to be an All Black for a long time."
The reality is, though, that he has to make himself hard to leave out. Injury to Read opened the door last year when he played three Rugby Championship tests against Australia and South Africa (twice) and, starting on Saturday at AMI Stadium, he has to make himself indispensable in the first place to Kirwan, who has two in-form flankers in Brendon O'Connor and Luke Braid.
Luatua's main rivals at the All Blacks are probably Kaino, Liam Messam and Victor Vito, all of whom are in form.
Hooker Keven Mealamu will captain the Blues, with Tony Woodcock and Charlie Faumuina will start after all three were named on the reserves bench in Dunedin. Mealamu responded with two tries in the second half, while Faumuina impressed with his pace and footwork.
Francis Saili replaces Pita Akhi, who has a hamstring strain.
The Crusaders are coming off losses to the Chiefs and Highlanders. It's not a good time for Kaino, one of the Blues' best, to have a rest, but it's up to Luatua and co to take up the slack.
Blues
15. Lolagi Visinia
14. Frank Halai
13. Francis Saili
12. George Moala
11. Melani Nanai
10. Dan Bowden
9. Jimmy Cowan
8. Steven Luatua
7. Brendon O'Connor
6. Akira Ioane
5. Hayden Triggs
4. Josh Bekhuis
3. Charlie Faumuina
2. Keven Mealamu (c)
1. Tony Woodcock
Reserves: Matt Moulds, Ofa Tu'ungafasi, Angus Ta'avao, Culum Retallick, Blake Gibson, Jamison Gibson-Park, Ihaia West, Tevita Li.