I watched Lemmino's mini documentary on the subject and can only recommend it [1]. He spent a month going through the Russian original evidence and is surprised why it is still considered an "unresolved mystery".

Some take-aways that I remember:

* They had a self-made, wood-fired oven in the tent, which had already burned one of the hikers a couple of days before (documented in a picture) and could have malfunctioned, leading to the burn marks and them having to abandon the tent (including slashing it open)

* Radioactivity: Both hikers that had traces worked previously in a nuclear facility.

* Missing organs: Exactly what you would expect from scavenging animals.

* Missing clothes: Exactly what is expected when dying from hypothermia.

* Bodily injuries: Suspected avalanche.

* Glowing orange spheres: Possibly space debris, a meteor or nuclear testing. In any case, no immediate connection to the accident.

[1] https://www.youtube.com/watch?v=Y8RigxxiilI (conclusion from 12:42)

edit: formatting