I disagree. I think the concept is open-ended enough that they can take the show in any number of ways. It doesn't have to be limited to what we know about him through Breaking Bad... that connection can easily be loosened by playing with the timeline... before or after Breaking Bad. It doesn't even have to be strictly about drug deals. He can deal with murderers, white collared crime, etc.
I think the premise is intriguing and broad enough for a long-running show... it will be a matter of creativity and execution.