Interesting as always.
A couple of thoughts pop up and it's only my opinion.
Firstly, I agree that they probably did send Scouts, there's antidotal evidence for this from other hike reports. Especially from dropping back packs and one or two forging ahead to make a trail. Then the others following whilst the leaders return to pick up their back packs. There's also evidence for travelling to get wood for a camp on snow exposed slopes. I think Igor did this for a sick friend in a tent, if it wasn't him , someone did.
Boot rock isn't an ideal tent location in my opinion, it's exposed from all sides and it's basically a crest or hill top where the snow doesn't gather other than snow drifts around the rock. These change depending on the wind. The ground would mostly be exposed or not deep with snow making it difficult to erect a tent.
It's possible that they sent scouts and decided on that location with the thought, as you have previously suggested , to make a dash along the tops of the mountains. It's also possible that they did have intention to gather wood for the night in the slope. We just don't know as the tent didn't seem to have the center ridge supported by the skis. This leads to two possibilities, one that they hadn't fully secured the tent yet for the night , or two, they had taken the supporting skis down in the morning before the incident.
There are 2-3 descriptions on how a pair of skis were found next to the tent. .this suggests that a pair was kept free to use as the support, or perhaps for someone to fetch wood or scout?