I agree, more information is always helpful.
As I understand it the logs purpose is simply to track head gasket failure. Not details of extent or what happened, it just failed. Keeping it simple to track year, mileage and engine of when it simply failed. Also to keep it from turning into a discussion thread. All the details of each failure would have turned it into a drawn out thread of discussion.
I am guessing this is because most ask how often these fail and just want to know when it is going to fail. It is across the board though and just simply hard to tell from vehicle to vehicle.