That question is probably better positioned for the Office of the Auditor General because that's closer to the scope of the OAG review. That being said, of course this could have been done better in many regards, particularly with documentation.
You mentioned transparency a number of times in your question. I think that's fundamentally what's causing so much of the concern. There was very little transparency associated with many of these procurement processes, and it's causing people to ask questions that will now go unanswered because there's no documentation demonstrating why decisions were taken.