Overall, I really like his mechanics! I think his shoulder will hold up fairly well, and the hard pronated release of his fastball will do a lot to protect his elbow (and give him life on his fastball, which he is known for). We can't know for sure how he throws his slider (without high speed video), but it's probably a supinated release and thus dangerous on his arm. In general, I prefer supinated curves to sliders due to the pressure a slider puts on the elbow, but I realize that sliders are called strikes more frequently and are easier to learn to throw.
Don't know enough to know if he knows what he's talking about, but it adds more information.
I do believe him about the scap-loading, and just seeing a pitcher scap load makes my shoulders hurt.
Take a look and see what else he says about Ross.