Could some of the pieces in the puzzle come from the enforcement? IBU and anti doping?
The IBU president has Dr. Ferrari on speed dial to get the latest dope and masking for his son. One little mention of this in the press and he resigns. See how much Verbruggen endured. Strange to say the least. To keep his sun on the snow perhaps as the greater cause?
The puzzle fits much better with Neuner and Goessner also on doping. How else could they not be matched by ANY of the proven dopers? If doping helps in any sport, it is biathlon. Relatively low speeds, huge climbing, and shooting which requires recovery.
And if Neuner well so well on dope at 17-18y/o, how can we presume she was clean at 14? Just not quite done building muscle. And hey, I am a huge Neuner fan, but have to be realistic. And I honestly can't see how a team of mixed clean and doped skiers can be so closely matched.
Neuner and Goessner sure are more talented for ski speed with a heavy rifle than Henkel. But to overcome doping available? Which doper ever stays away from hard core blood doping? Only very rare ones. Stupid ones.
I can see one highly hypothetical scenario, where Neuner got fed up with the system of doping, the lying, the hiding, etc. And as leader of the team proposed for every one of them to go off the juice religiously. She may have liked her chances to do well, but her team mates and coaches would likely not want to stop feeding the geese that lay the golden eggs.
So Neuner goes on limiting her doping Ullrich style (as claimed at least), taking just enough to stay around the best ski times. No more nuclear. And as such, open to more stringent testing, knowing she's now well within testing limits at all times.
Failing to get satisfaction of winning doped, and seeing no way to end doping without hurting so many people she holds close to her heart, she gives her devoted fans a year to get used to losing her, and then leaves the sport.
Goessner may then have followed Neuner's lead, soft doping, and recovering slower from her injuries than we've seen of other world class athletes. Football players, and even XC skiers.
Rather than suddenly improved skiing from midfielders joining the best ski times, I prefer to see someone like Makarainen starting to hit more targets. I'm sure blood doping would help shooting performance, but her skiing seems well in line with previous years.
Folks like Peiffer, how did they go from top skier to never again? How do they find energy to continue? So easy to assume that he just got a double dose, was lucky to avoid detection or have his coach buy off IBU (very plausible if necessary with such leadership) and now backed off the juice to more sensible levels of detection risk.