otoh, what steady gigs usually do for people who don't really have all that much to say is to broaden their ways to say it.
I don't know of any "process" that will make somebody interesting, perceptive, original, whatever. Either you are or you aren't. Them that are usually/eventually find ways to protect & nurture it as best they can under any given set of circumstances. Them that aren't find ways to avoid confronting it, including avoiding silence (at many different levels).
Keep in mind, also, that this music is now taught in colleges and with Master's level coursework/education, producing nice little leader-packages ready to record for Fresh Sound New Talent or any other series of labels. There isn't quite the "university" of going through other players' bands for months and years, with the held-over runs at the Five Spot and the Vanguard (or wherever) to aid in that definition of a musical personality. And that's just it - personality is what is often lacking through this new process. It's a different reality. But that's not to say that with some time and some settling, that reality will produce equally interesting players and performance structures. They might just look a bit different.
Of the "new guard," I'm consistently nodding in utmost respect for Talibam!, Mary Halvorson, Weasel Walter, Aram Shelton, Jason Adasiewicz, Rob Mazurek, Nate Wooley, Mike Reed, and Rodrigo Amado.