It is super interesting to be in the "players are human" camp - although being pro analytics certainly does not contradict that. (Cora is very much both!)
Analytics are great to answer "what happened", "why it happened" (or more accurately the reverse - eliminating reasons why it happened), and a certain degree of "how it happened"). Where analytics fail - where the scouts, coaches, manager and players take the mantle - is how to fix it in the real world.
How does the manager implement that? Well, clearly some of that is developing a plan with the org and with his coaches - and then there is the squishy stuff. Of course that stuff matters.
And of course it is no guarantee what Cora is doing is built to last. It might be. (I think he was labeled to be really really good at this for a few years now) But Farrell established a different work environment which at times was also effective. There was a resourcefulness and intensity in the last two years - especially last year where the team fought through a lot of adversity to have a good season. (some of that adversity of their own making)