Professor wants to include a specific (maybe unnecessary) issue and focus less on other necessary ones in LoR. Please share your perspective
I think you should defer to the advisor on both counts. I don't see any negative implication in the first point. It is actually pretty high praise.
And on the second, I'll have to guess that his judgment is based on more experience than you have.
Moreover, if he doesn't feel constrained by your &quot;instructions&quot;, then he will probably write in a more natural way and that, alone, could make a difference when the letter is read.
I think that trying to micromanage this would hurt, not help.