I have the same sense as the OP that we have received many useful refinements around the edges - bug fixes and minor enhancements - but: no truly new features as was the case with Opus 13.
I would offer a caveat, a consideration and a concern.
The caveat is Opus 13 was a more than two year project so perhaps we should wait a few years to assess the current updates pace.
The consideration is that Opus is a mature product in the file manager space, nothing else comes close in power and customization, so transformative new features are unlikely or involve more complex processes and cater to a smaller user pool. Would this be a truly new feature?
The concern is over the possibility of bloat in a heedless search for the truly new feature. Would an AI-assisted voice activated Opus be a truly new feature? Would you want it?