Just a few things to pick up on about stats. From what I've read about Mitchell and the set-up at Southampton, there seems to be an impression that he is just sat looking at stats all day, in some kind of football manager-esque style. From what I understand, part of what he did was statistical analysis, but he also apparently spent a lot of time studying videos and analysing performances, positions taken up in a match, positional and tactical weaknesses, errors that are consistently made.
I'd also point out that if the club was planning to rely too heavily on the analysis side of things, they wouldn't have brought back Bloomfield, who is a very respected traditional field-scout, or employed a bunch of other scouts to work with/under/alongside Mitchell.
I think its right to have a balance and as long as Poch gets what he needs to make the system work, I also believe that decision by transfer committee based on analysis and a variety of opinions isn't necessarily a bad thing.