This system looks very different from a couple of years ago. Then, all the value was in a few top end guys - Wood, Crews, and not much else. This system lacks the close to the majors position players of high value. Even Willits and Fien are not seen as locks close to the majors. As Slate says, add in Sykora's injury and Susana questions, the system doesn't explode with locks that are likely above average.
That said, it's extremely deep in terms of guys worth tracking and who have a decent shot at being something. They hit on one out of 5 of their 35+ or better and that's a lot of of help. I think they will likely have more than 50 guys in the next FG system review. They had 44 at the end of last year and added another 6 in the Ferrer and Gore deals, plus the international signings. If there's an Abrams or even a Garcia deal, it only gets deeper.
I can see maybe a ranking around 10-12 for the system now, but I can see that jumping with another draft, development of Fien and Willits removing uncertainty, and some of the pitchers getting healthy.