I'd be curious what someone who actually works "around the league", in a non-biased position (as opposed to Casey Close) has to say. Your extreme view may in fact be spot-on, un-hyperbolic truth, but I doubt it.
Aside from that, I'm really not quite sure how you think the Astros did so wrong by Nix, other than perhaps being shitty communicators about what was going on. Or rather, I'm not sure what you think other teams do differently with their 5th-round picks.