https://www.popehat.com/2013/02/05/crime-whale-sushi-sentenc...
Now, it doesn’t (in general) mean “Is likely to receive, if convicted”, which some people tend to assume, but it also doesn’t mean nothing. And given the fact that upward departure is allowed from the federal sentencing guidelines, but not from the statutory maximums for the offenses charged, it is literally all you can tell with certainty from the charges themselves.
Opinions will differ on this highly subjective question.
> How does this fact aid my understanding of the severity of what he’s done?
It aids your understanding of the potential consequences, not the severity of what he has done.