I wouldn't drop the protein level of any show ration to below 11-12%. Its is very important for building muscle shape in growing calves such as this. I think your steer has a lot of good to him and could be a good one in the end. A couple of things I would consider. First of all, his center of body. He is a very long sided steer, which I like, but needs more middle to him. I would think about increasing his hay intake to as much as he will eat and still clean up his feed. After he starts to cover real well you could add beet pulp or products such as Purina Depth Charge to his diet to help add some guts.
My second concern is that he looks like he could be a hard doer. What I mean by that is he could be hard to get fat enough to look the part in the end. I don't know your ration at this time but I would slowly work him up to a 50% corn ration. If he is close to that now, say a 45% ration, then I would think about adding some Purina Power Fuel to his diet. He looks like the kind that will need extra energy to get there. I don't know your end point for the steer but if it is late fall or winter I would get my crock pot ready and start cooking corn around the end of September. I would also think about adding stabilized rice bran about this time. You can also cook a little barley with your corn for added energy.
Has all the right pieces but needs more center of body and to be softened up before his end point....G-Luck