Dear 777, welcome.
To begin with, my whole family line is 'quranist' as in we give the highest importance to it and follow its teaching etc, however this term 'quranist', I found out from this website, my experience from observation is my grandfather, father and I, that would be 3 generations of experience of being a 'quranist' I have. Like I mentioned I just found out this term from this website and this whole group over here
I doubt you would have found this term 'quranist' being propagated on this website - most of us here are 'Muslims,' while Quranist sounds like a sect that worships something other than God alone (I assume they worship the Quran by the name you have given them).
Anyways, as tremendous as your experience has been with the ritual Salat - I have read similar ideas from people who do Yoga (the clarity, the discipline, the lack of depression, etc..). In fact, even just normal disciplined excersize will give a person clarity and focus...
God will judge His creation by them adhering to the 'Straight Path' He has given - not for perfecting the art of a ritual.