1. An analysis of what allowed the situation to get out of control to begin with
2. Systematic changes to prevent it from happening again
Otherwise you will just be in the same situation again in 3 years. And neither is included in Microsoft's messaging here.
Microsoft doesn't have any trust to lose, and they won't be gaining any by this move.
That is the one advantage they have in all of this. Their public image is as bad as it can get.
Then why even do it?
1. An analysis of what allowed the situation to get out of control to begin with
2. Systematic changes to prevent it from happening again
Otherwise you will just be in the same situation again in 3 years. And neither is included in Microsoft's messaging here.