The writing style PH used in this one is called "Perspective", or "Narrative"; it's a legitimate writing style.
Like some, including PH himself in his article, pointed out, all the available info out there on Team Plasma is only how they look like. Instead of posting an analysis on such an incomplete piece of info, he added some bits of comparison to previous Teams and made it a sizable piece of text. Basically, he rewrote the sentence "Not enough information" into a point-of-view letter by a character who normally won't be involved in the said topic. Call it out-of-character if one wills; it's certainly something unexpected. That's not bad a trait at all, for somebody who's writing regularly for a column.