We all know the value is speculative, even on guys like Bello and Casas to some degree, but the improvement on paper is obvious.
Of course, we won't know until we see the results, just as those who slammed DD for "emptying the farm" are now happy he brought us Casas and Bello (and Crawford, Duran...)
Not all 16th ranked farms turn out better than 30th ranked farms. I get that. I have gone out of my way to keep saying "speculative, speculative, speculative," but to some extent every move made by GMs are speculative, until you see the results. All we can hope for is to think an improvement on paper will translate to wins and maybe even rings.
It's not an exact science, but not thinking Anthony, Teel, Mayer, Blies and Cespedes have major potential and that the likelihood 3-4 end up doing very well isn't something to be happy about, seems a bit harsh, to me, but to each his own.