I don’t think anyone should get Fred Warner comparisons any time soon, especially not someone who has barely played.
If Davis can put the mental and physical fundamentals of the RB position with his great talent, I’m all in favor of his getting more touches.
Herron and Ellis have improved a lot the past couple of years. They aren’t just going to stand still while Harper improves. Herron in particular hasn’t hit his ceiling yet. Ellis may have, but he is completely reliable at this point from what I can tell.