I do not know anyone who would promote it. I highly doubt there are any coaches that would recomend it.
But if i can play the other side, (I promote 2 or 4 seam) why change a kid that has had success? I have see him throw all 3 fb's, no noticable difference in velo. No change in movement. Do i change him for the simple fact that someone will change him eventually? Do you think the velo and movement will come with confidence?