Agree with your thoughts on this thread. I love the Young example. All the Farrell bashers were tripping over themselves in ripping Farrell when Young played against a righty. But now look at his overall stats. And even though a .224 BA against righties isn't great, all four of his homers are against lefties, six of his 11 hits against righties are for extra bases and an .807 OPS against righties is very respectable. Critics loved to point out how he hit just. .182 against RHP in 2015. But while a manager should be aware of those numbers, he needs to be flexible too. In 2014, Young hit .243 against RHP and just .143 against LHP. Things do change from year to year.
As for pitching or being a good in-game manager. The Sox first manager I remember is Eddie Kasko. So let's go down the list (off the top of my head): Kasko, Johnson, Zimmer, Houk, McNamara, Morgan, Hobson, Kennedy, Williams, Little, Francona, Valentine, Farrell -- of them, who were good in-game managers according to fans?