Canadian Report
I scanned through the report, and honestly it is a waste of paper on which it was written. The Iranians in their preliminary report have come as close as possible without explicitly saying so that their supposedly invincible Revolutionary Guards have screwed things up in a monumental way. Pretty much everything that affects the aviation aspect of this tragic incident has been answered in that report. It is also clear from the initial reactions and the surprisingly unrestricted access of the local media to the crash site, that for the first 10-12 hours the lower ranks of the government were not aware of what really happened.
The 'crucial unanswered questions' raised in the report are all related to the command structure and training level of the Iranian military, and it is quite obvious that they will not answer those questions. Nobody else would. On the other hand, knowing Iran I would expect that those responsible have already received a far harsher punishment than any counterpart in western countries under similar circumstances.