If you accept that Dyatlov, Slobodin and Kolmogorova died in the process of returning to the tent then the key question becomes - What is the reason for leaving the tent through cut sides (BTW some of the cuts on the tent appear quite straight and long which suggests to me that when cut the canvas was reasonably taut not collapsed and folded.) without shoes and coats, moving 1500m or so away and then at some point deciding to return? If an avalanche or slab slide had occurred and made accessing the clothing/equipment impractical how would that situation be any different some time later ? The attempted return is hard to explain. Were all 3 confused from the effects of hypothermia so much so that they believed they could reach the tent, overcome whatever the original obstacle was to retrieving useful items and return ? Seems a stretch.
If you accept that the mountain of Kholat Syakhl has a special microclimate, then a theory that accounts for everything is possible. Without this missing piece, the evidence does not tie together, and hence the mystery for such a long time.
I think that severe weather around Kholat Syakhl can result in snow being transferred from the west side to the east side. Strong wind gusts funnel up the west side of the mountain and go over the top, which causes snow to "rain down" on the side where the Dyatlov group was camping. This snow came down on the tent as two of the group, well-dressed for it, were outside inspecting or fixing the tent because of severe high winds. The eye-level slits in the tent were used by Igor Dyatlov to communicate with the two outside the tent. He most likely had a flashlight that he could stick out of these slits to see better outside. This flashlight was later dropped outside when the snow raining down on the tent caused all the hikers to panic and assume an avalanche had started. A second flashlight was dropped on the way down the slope.
Later, after the fire at the cedar tree gave out, the surviving seven created a den in a nearby river ravine. This eventually collapsed and a mini-avalanche ensued, killing four as they tried to escape down the ravine and injuring one (Rustem Slobodin). The three survivors had no choice but to head back to the tent and hope that it was still accessible and usable. Dyatlov died on his back while the other two were there and communicating with him. Eventually the two remaining survivors succumbed to hypothermia as they continued toward the tent.