If you're happy with the sound, that's all that matters. You definitely aren't getting an "objectively bad" experience with that setup.

When I lost my btr5 I upgraded to the btr7 and.... I miss the BTR5. The audio difference was imperceptible and the form factor if the 5 is just way better.

I'd argue that a planar IEM like the 7hz diokos would be a noticeable improvement sound wise, but there's no need to really start chasing that unicorn. I could happily live forever out of CCA CRA's.