Firstly I would get the peep moved to where you are comfortable with it not where he says is standard.
I agree. I recently had a Trupeep put on and the shop owner says I wanted it higher than standard. I didn't care because it was comfortable to me and any lower and I would have felt the fletching against my face. So far I am shooting better and more consistently than I have in years.
Go to a string loop and do away with the brass nocks. I relented and am using my first loop..........much more consistent release and no worrying about nock pinch.