Im no analytics expert, but I think where analytics worshippers go too far is their belief that data from the past is always determinative going forward. It simply isn't, and the embodiment of this is the many late round picks (all of whom were measured analytically) who go on to outperform their higher-drafted peers at the NFL level.
Its human nature to develop predictive models, and while these will inevitably get better with time, they will always be confounded by the unpredictability of the human element.