First up, I don't think many people deny that over the years he did a consistent job with what he had to work with (although his schtick was painful towards the end of his reign). His 'transfer skills' are over-rated, though, and pretty much irrelevant to the present-day situation.
However, he wasn't shy about letting people know about how he was doing either. He had the knife to a gunfight routine down pat. He acted as cover for Kenwright over any fan protests. He negotiated with Ferguson behind the club's back (although I wouldn't be at all surprised if BK knew all about it) and deliberately ran his contract out. He then attempted to buy Baines and Fellaini on the cheap and knocked down criticism by saying he never would have stood in their way and that he 'knew how Everton worked'. He criticised Everton fans when they reacted to this.
I also have the suspicion that he is not a particularly nice person (based on nothing other than his latter press conferences, his TV appearances, threatening to slap a female BBC reporter and his agent brother negotiating the move to ManU).