There are several aspects:
One is that when hikers come up from Auspiya to the pass and then to the mountainside, do they come all the way on skis?
When they talk about clues, it's almost always just the clues between the tent and the forest strip! What about the clues they had to leave when the hikers came up? Hm? Why are these never discussed? Why don't anyone miss them?
So it is questionable whether they could come all the way on skis? If there are stone roller lanes there, as they are towards the forest, then it is not certain that they could cross them with the skis. Maybe they had to take off their skis there and walk! If they came all the way on the skis, who can say that 9 or, say, 15 people were walking in the ski trail? Why isn't this ski trail preserved? Why doesn't it stand out like the footprints between the forest and the tent? What rules out that from that direction, following the hikers, strangers could come up to the tent on skis on these tracks? Or from any direction? Because if these traces of hikers had disappeared, then the traces of possible strangers would have disappeared too!
The other may be better explained, but it's also strange! Why don't the snow blocks of the slab-avalanche, which, due to their mass and kinetic energy, break ribs according to some assumptions, leave prominent traces like the footprints of hikers? If they can break ribs, then maybe they can compress the snow enough to leave a prominent trace of it!