Hello Bamboo,
I don't have real answer to your question, but I clearly resonate with your experience.
I have felt quite the same when I wanted to change my practice. I thought at the time that it was like an "energetic betrayal" (so to speak), as if some part of my identity was bonded with the practice.
So at some point my question was: how can people gather several practices from different lineages? Is it just that they have some "energetic flexibility or suppleness" or because the exercises have no lineage whatsoever so no bond is created?
Thank you for your question, I am hoping that someone will give some light on this.
Leopoldson