Yeah but the article itself states nothing new, if he said he actually thought AVB was superb, then it would be something, but to state facts followed by the general consensus about AVB is a waste of writing.
IMO his biggest mistake was leaving Porto after one season to join Chelsea, for several reasons, like the fact that he had only been managing at the top level for one year (no matter how amazing that year was, and it was), and because, of all the clubs, he joined Chelsea, where the Mou brigade was still heavy and the expectations for him to be the next Mou were greatly increased. If he had settled in Porto for one or two more seasons, with CL experience and whatnot, he could have been much better than he is now. He can still make it, perhaps, although he's stated that he doesn't want to be a manager for very long. Ironically, the only club which was willing to give him "more time", was the club he himself decided to leave after one season.