Reading the report brought back a memory that scared me a number of years ago regarding height loss in an aileron roll especially with insufficient pitch at the start. The mental stick check pre manouvre being "up-check(the stick to neutral)-roll".
I flew two aileron rolls in succession and within the required airspeeds. However I entered the second roll with no pitch input. Inverted during this second roll I found myself pointing toward the ground as a result of the nose having dropped substantially. Continuing the roll I recovered in the normal way but had lost substantial height (IIRC 1,500-2,000 entry height but less than 500ft exit height). I was very shaken. Despite being trained as an aerobatic pilot in the manouvre I had experimented with two in succession not thinking of the consequences.
"There but for the grace of God.."
I recall the accident at the time and especially my sadness for the loss of the pilot who was clearly loved. My condolences to the family.