I think the no help on the horizon line overstates things.
Peraza is a Top 50 prospect who will be major league ready within a year.
Sims is a Top 100 prospect. Between Sims, Hursh and Parsons, I think we'll see one reliable mid-rotation starter emerge by 2016.
Bethancourt is a Top 100 prospect that will be cheap and cost controlled for a while.
Further away, we have Albies. I suspect he will be a Top 100 prospect by the end of next season.
I have a higher regard than most for Kubitza. I think there is about a 50% chance he will provide a cheap in-house solution for 3rd base.
There are some weaknesses in our farm system. Two in particular. One is the lack of starting pitching at the lower levels of the farm system. This showed up in a dramatic way in the condition of the pitching staff in Rome this past season. Given the attrition rates for pitching prospects, we had nowhere near the prospects we needed in high A and low A. Maybe some of that will be alleviated by the players we took in the last draft (Fulenchek, Povse, Sobotka, Diaz). But it probably won't be enough to get things back to where they nee to be. The other issue was the shortage of positional prospects in high A. Once Wren and Peraza got promoted, there was little left. So in a year or two there will be a situation where there is little help available in the upper levels for promotion to the bigs.
I count Bethancourt and Peraza as "here" already - my bad.
Outside of them Albies has a long way to go (and will also have to eventually change positions assuming Andrelton and Peraza are cornerstones), and even if one of Sims, Hursh, or Parsons can become a reliable #4/#5 Miller and Jenkins both have significantly higher upsides.
I agree that there are a few interesting pieces when you dig deep, but there's very little impact talent in our system anywhere.