I didn't take Fontana's world cup performance too much in consideration because I know how the Italian team did set up the entire season...
our main goal was to qualify the relays, so we put all of our efforts into that, leaving the individual races a bit apart (the short track world cup requires the athletes to skate all the races -all the rounds- in just 3 days...so, you have to make some choices...especially when you're looking at specific targets and/or you know that you go to those races not in your best possible shape)...
in particular, this season she was asked to carry the load to achieve our main goal (since she was almost sure to get at least her individual qualifying spots, meanwhile the relay quali wasn't as safe before the start of the season -there were also many doubts about Valcepina's shape and we can't afford to rely on average skaters as Peretti, Maffei and Mascitto only)...
and despite that, she still managed to be competititive in "her" special distance (the 500m)...but of course the prize to pay was that she had just average results in the most demanding 1000m (a distance she has never liked that much through her entire career) and 1500m (where she is good but inconsistent, sometimes she can stay with the Koreans, Chinese and Canadian girls, sometimes she just can't)...
moreover, I know her history...I know how she can focus and peak at the "big events", meanwhile she isn't always interested in going full speed early in the season (and the world cup races are normally scheduled all in the first part of the season..in December it's all over)...and as a demonstration of that, let's remember that she was 3rd in Vancouver, 2nd in Sochi and more than once 1st at the world champs in the 500m race...
for what concerns Boutin, instead, I always considered her the classic skater with regular strong performances, but unable to peak when it really matters...and the Koreans, as good as they are, can't never be considered the favourite over the 500m distance since they always have problems at the start (and Choi is no different, though she's a bit better than her compatriots)...
the Koreans, moreover, are always in the same situation as the US swimmers and athletics specialists (or, if you want to stay with Winter sports, the Norwegians in CC skiing)...they have to start the season very well to earn your spot at the main events of that given season, since there are many contenders for the few places available...and this sometimes (often) leaves some room for the others to beat them later in the season, when people from other teams can peak, meanwhile they are a bit too tired (mentally more than physically, I guess)...
on the other hand, the Chinese staff has always been good at protecting their best skaters...that's why I consider Fan Kexin always the most dangerous threat for Arianna in the big events among the group of athletes (in which Boutin and Choi...and not only them are included, of course) who are good enough to be real medal contenders (other than her characteristics, strenght and personal history, of course)...