The Solo Pro redesign was pretty great, so why the Studio 3 didn’t receive the same design updates in a refresh is astonishing; it’s been the same design for at least five or six years. If they indeed retain that current horrifically cheap design then it won’t be worth the price at all, especially if it stays $349.
The Solo 3 being replaced by the now-discontinued-but-should-return Solo Pro, Studio 3 being replaced by essentially an over-ear Solo Pro design, and Powerbeats Pro with noise cancellation and transparency mode (and like 40 hours of battery life or something ridiculous like that given how massive they are) would be a worthwhile rounding out of the Beats lineup. All using USB-C instead of lightning now too, of course.
Doubtful any of that will happen though.