I agree it's a little crazy to bring in as many guys as we do, but as to the roster players, I don't know how you are measuring 'attention'. If it's hours, how many hours did the Jazz spend developing Kanter relative to guys like Chris Johnson?
Probably not much is measurable given publically available data. But from what we hear in interviews and in the press, the Jazz seem to talk more about player development as a core piece of strategy. You can measure the number of players brought in for workouts, we lead the league in this regard for sure.
My broader question is around opportunity cost: "what else could we be doing to improve the team with the time (1,000s of coach-hours) and money we took to develop Chris Johnson?"