At first Randy came up as a typical white meat baby face that was very cookie cutter until his injury that took him off tv for a few months. Upon his return to television we got the first taste of him as a heel being a part of Evolution. The "Legend Killer" gimmick fit Randy to a tee and was almost an extension of himself and it only got better as time went on from feuds with Shawn Michaels to a legendary feud with Mick Foley. In my opinion though when he made the move to the "Viper" it only got better as his time as the viper was the peak of his career.
However, in recent years Randy's career hit a stand still and in way become quite stagnant almost like he was just going through the motions and phoning it in every time he was in the ring. This lead to many fans wishing for the day that Randy would go back to his old ways and get another run as a heel. At Extreme Rules it happened when Randy returned to attack Jeff Hardy he officially changed to back to a heel. Now we have exactly what we've been waiting for and that is Randy in the position that he has always felt most comfortable. The benefit this brings to the WWE is that now they have one of their best heels in modern era back doing what he always did better then most; and that's get people to hate him. Overall I think this also does wonders for Smackdown's heel roster as it gives guys like AJ Styles someone new to feud with that they might not have had the chance to feud with before the turn and that feud is something I'd tune in to watch.