You articulated the dilemma very well. What are they doing to advance the form? I've always thought of this as a kind of "dirty little secret" in modern jazz. Putting aside Coltrane's really far out explorations at the end of his life, the influence of his style was so huge in jazz that it created, except for the very best, a whole generation of players that had a stylistic inprint that is a kind of caricature of Trane. With Potter its more about were Brecker took the Trane thing than anything, but still clearly going back to Trane . That's one of the reasons I like Joe Henderson's playing; he took a very different road than the Coltrane highway. For the listener it's a matter of just how deep into the nuances of the evolution of styles one wants to get. Along the way there are some players who are clear "significant deflection points" (I like that term). I will say, however, that getting to know the playing of good players who are not necessarily stylistic ground breakers helps to understand and appreciate those who are a great deal. I used to feel this way about Joe Lovano, but I think his playing has matured a great deal and he is truly advancing the form. I just posted this, but in case you missed it. I think this is just great. Interesting the similarities to Henderson's sound:
https://m.youtube.com/watch?v=oVne9WvVP40
As far as your comments re the more traditional jazz I would say that to focus only on the deflection points would be a big mistake. There were far more individualistic players back then who are really worth exploring and who while not being major deflection points were just so good and so fun to listen to. This is just one of those players. Amazing ballad playing and feel good vibe. And what a tone!
https://m.youtube.com/watch?v=RKby3ZnxmAI

