If you like what you are hearing now, I would just back and enjoy rather than obsess about what you might be missing. The trick is when to learn when you’ve crossed the finish line. Enjoy the music that this system is meant to reproduce.
A word about getting an “expert” to look at your system. I was a Primary Care Physician. I had many patients who would be absolutely stable on their present medical regimen. For whatever reason they decided to see a new Cardiologist, Pulmonologist, whatever. Frequently the consultant would tweak one medication, prescribing a substitute that did exactly the same thing. Why? The consultant needed to justify the time, expense, and effort that the patient had made in seeking them out. I am sure that this goes on in other fields as well. So if you invite someone into your home to evaluate your set up, with which you are currently pleased, I’d be shocked if if they said “It’s all good, don’t change anything “