its sad that most pws will never try your recommendations because it goes against what our brain tells us to do (not show our stutter to others) i can guarantee that a majority of pws can start start seeing benefits from the recommendations that you're providing only if they commit to following them for at least a month. I did something similar (and more), in my journey to overcome my fear of stuttering, and I'm in much better place because of it. Nowadays I'm constantly challenging myself, and almost look forward to putting myself in difficult speaking situations. I've learnt how to handle these challenges, and realized that this is the ONLY way to improve.