The root cause analysis from three different engineering firms is in the linked analyst reports in the footer. Samsung are not being patronising, they're producing content all their affected customers can understand with the infographic, and for those that are more technically inclined or curious - they releasing the technical reports they commissioned in full with all the analysis and findings. You can't fault them for that level of disclosure.
Actually, the linked pdf's are presentation slides that do not contain any relevant information that is not in the infographic. On the other hand, on this level there is not much more to say, finding and removing the true root cause (ie. "this process step was badly designed") is problem of the battery manufacturer and not Samsung itself.
