I think you mean prognosticators.
Clayton is good at developing contacts within teams to get information.
He is awful at injecting his opinion.
Many times he guesses at what teams are thinking, who might be interested in a player, or who they may want to draft, etc, and his record is terrible. I also find his logic in supporting his opinions weak (he is the king of "well they have ________ so the X( defense, running game, pass rush, whatever) should be fine" ignoring that 11 men are on a football field and thinking 1 is all that is needed)
If his job is to REPORT then I think he is good.
If his job is to offer opinion (which he does a lot of) I think he is one of the worst out there.