Excuse my question, but have you actually heard the Roxanne to make such a statement? I actually find the fact that UM keeps churning out flagship IEMs with ever-increasing driver count in short time windows speak volume about the sales performance of Mentor and that's even more on the marketing side than the Roxanne is, like "Oh, so our 10-driver design did not work out that well, so we're going to slap a few extra drivers and a grand-sounding name into it and call it a day". Now that's obviously not the case in reality, but that has been the vibes I was getting with the Mentor.
Hey it's also my opinion, but I'm sure a lot of folks out there do agree with what I've said. Remember that the good old Miracle was performing extremely well for a good couple of years as their flagship before UM decided to take it out of the monitors with the not-so-well-received PP6. To be honest, I still hold the Miracle as UM's flagship even until now, and everything they've done after the Miracle seems to me more of experiments rather than serious attempts to gain more market share from their competitors.