I looked at your sample report, and it seems very much like an expanded "linkedin", where it's just about the positives. Knowing - honestly - where someone is weak will help avoid bad fits.
I've been a reference for a couple of folks recently, and I always ask the person calling what the style of the role in question is. Person X might be a great person and capable of XYZ, but only with support/oversight from a more senior person. If the role is expecting them to be self sufficient, and I know they need oversight, I'd try to push that. Me just saying "oh yeah, they're great", or only talking about the positives doesn't really help as much as a full set of questions which also include honest downsides/weaknesses.