The two players dropped for the first two ODIs against South Africa from the Chappell-Hadlee decider in Hamilton last weekend are Colin Munro, whose form has been patchy, and stand-in opener Dean Brownlie, who made a valuable 63 in the Seddon Park match against Australia.
Larsen acknowledged sorting the Larsen-Brownlie opening conundrum had been "an incredibly tough call", once Martin Guptill proved he's over from his hamstring strain.
Latham scored 137 against Bangladesh in Christchurch on Boxing Day but since then, it's been 22, 4, 7, 0. Still, the selectors want him in at the top.
"It was a marvellous innings [Brownlie's 63] but he was playing a holding role for Guppy. We believe we have our openers and see them as a long term ODI opening combination, but Deano has certainly proved he's got what it takes."
One player who should benefit from Munro's dropping is Jimmy Neesham, likely to get an opportunity at No 6 against South Africa. He did well at No 4 in Australia before Christmas, filling in for Ross Taylor.
Neesham's bowling is a work in progress but Larsen is seeing encouraging signs. With Corey Anderson still unable to bowl due to back issues, Larsen confirmed Neesham is rated ahead of Anderson for a one-day spot.
Anderson is in the T20 squad, which has a good look to it, although Taylor's backers will insist he should be in there. The selectors' view is that Anderson, Munro and Tom Bruce all played thunderous innings against Bangladesh in that T20 series batting around Taylor's spot, and are ranked ahead of the veteran in that form.
The squad for tomorrow's warm-up game against the South Africans at Eden Park is a chance to showcase some younger talent, and Auckland pair, opener Glenn Phillips and Mark Chapman, have a big opportunity, if selected in the XI.
But the most cheering news is the return of speedster Adam Milne, who hasn't been sighted in domestic cricket this season as his dreadful run of injury setbacks continues.
He's fit again and Larsen is delighted: "Having him back is tremendous. He's been a long time off the park and we know what he offers when he's operating at 100 per cent."