Well, all three are pretty much established as, at least, competent IBU Cup athletes, if not WC. So no big surprise to find them here, they were in the mix as a dozen others before the race.
Overall the Norwegians are not particularly dominant (often the case at this age group), only Nevland and Frey have been seen outside of Norway (which is telling about their abilities in itself), with very decent results but not enough to deem them as n°1 favorites.
No Russians also.
The French are particularly poor this year. Combined with the performances in the IBU I fear we might have to reduce our expectations in the near future, but that's something to be expected as French biathlon has a lean production process.
Repinc has had recurring health issues. But I don't consider Slovenia as an "exotic" nation and I reckon they have the means to get athletes to the top level. Maybe below what could be achieved if the athlete was German, but still. And look at Sara Andersson, just like Repinc she was the next big thing two or three years ago ... and she's Swedish.
In fact a lot of young athletes never make it to the senior level. But the bigger nations' pool is wider, with more promising athletes. We're biased because we tend to remember the couple of ones who fulfilled the expectations while failed talents fall into oblivion. The umpteenth Norwegian is more easily forgotten than the one and only Serbian.
Overall building expectations over such young athletes is more often than not destined to fail. Particularly young women, with early puberty, unknown margin for progression, most of the time unknown workload, unavoidable health issues ...