I try to keep an open mind when I look at the photos of her apartment because there is no way to definitively discern what was moved or touched by family or friends and what wasn't. Out of an abundance of caution, I prefer to assume that anything that was not consistently reported by the family as having been untouched prior to the photographs was probably moved or handled - which is absolutely not the fault of the family.
For example, with her bag - I think would have been totally reasonable and understandable if her parents had gone through it to look for clues to her whereabouts. As concerned parents, I would imagine they could have gone through anything and everything in the apartment to try to get any indication as to where she could be - especially after receiving the brush-off by the police.
The most frustrating part of this case, and, in my opinion, the biggest detriment to any progress towards a resolution, is the vast amount of misinformation and misstatements of facts. Lack of information on the investigation has led to the acceptance of misinformation as truth. Inaccurate information has been widely disseminated by the media and the public alike, both intentionally and unintentionally. As a result, numerous details and facts related to the case are frequently conflated. We all are trying our best to help in any way that we can but due to this issue (and many others) we are stuck.
What about going photograph by photograph to see where the theory would go if we assumed only that one item or group of items was untouched/untainted and assess what impact that would make on the possibilities when combined with the facts of the case?