I saw this answer and thought I shot myself in the foot by messing up my meeting with my supervisor when asking for a letter of recommendation and not clearly mentioning what I am interested in. I did mention the universities and why I am interested in them, I mentioned key research topics but I noticed he didn't follow or maybe I did a bad job of explaining. So after I said "Key Topic1, Key Topic2..." we digressed and he gave me advice about research interests and emphasized I should know what I am going to do because I said I liked the idea of rotations in the department. I agreed and said I did come to a decision where I could separate what I can be idly curious about and professionally curious about, so again we digressed, and he focused on key topics I did show interest in and encouraged me to really find what I enjoy and like (same advice came up twice).
I genuinely enjoyed the conversation and learned from him as he shared past experiences but I got worried when I left thinking I should have presented a clear idea of my future plans. I trust him and I don't think it could affect it but I wondered if I gave a bad impression by not explaining clearly even though I think I did.
Could his thinking I am not sure what to work on affect the quality of the LOR?
Should I salvage this by sending a statement of purpose draft that outlines specific research interests?