Drafting is not a science, at some point it comes down to a player putting in the work or simply staying healthy. And keep in mind as a teams roster gets stronger, you simply can't expect all draft picks to make a team.
Sure, in hindsight Jones was not a good pick because he did not make it, but the term bust should be assigned only to highly touted 1st or 2nd rounders that never make an impact, not middle to late round picks where league averages show most are not in the league after a few seasons.