You could also put in a reflexive chapter or section which basically states what you have found out personally, what you would do differently and what inspired you to use the methods that you did. In your case, you could write a section that says that you took on board the feedback you received and that is why the study changed slightly.

I don't know what your area is but I am Human and Health Science and my supervisor advised me to do this to say how my own experiences may have influenced my research and what I did to overcome any bias I might have had.

Nice idea. I'll have a think about that.