Taking the optimists view, Callis suggests the talent seems to be there if the injuries can be overcome. Giolito, Purke, Solis, Rendon all seem to have that issue. The system will rank very low in BA this year, I think, but you could see a rebound with health. Of course, you could see a huge fall off too if Goodwin looks overmatched in AA, Skole loses effectiveness against better pitchers, and the injuries do not work out. But I'm a 'Shiner.
The system may in fact be stocked already. The talent is there. It really is a question of whether the injury bets pan out. If the 3 arms (Giolito, Purke, Solis) recover, and Rendon overcomes the injury bug, then this is back to a pretty well stocked system, rounded out be the Karnses, Rays, and Rendas, before you look at the athletes like Taylor and Hood who have important years coming up.
The biggest question mark in my mind out of the walking wounded would be Purke. I don't like shoulder issues. They have to show it, but I'm more optimistic than pessimistic about Solis and Giolito.