They are batting .239 with RISP and .231 with the bases empty, so the real problem is not hitting enough in general. They are starting to fix that though.
I think it comes from the Fielding Bible although it isn't listed online. I believe it is incorporated into the FanGraphs defensive numbers which would explain why he looks better on FanGraphs than statcast or b-ref.
Re-sign Rodriguez or the equivalent, sign another pitcher like they did last year with Lorenzen/Boyd, trade a middling prospect for an old right-handed hitter with a year or two left on his contract (unless they can find one in free agency). Bring up Keith and Malloy when they are ready. That would be an entertaining team.
I expect Harris to be a competent GM. I haven't seen anything which makes me think he's an elite GM worthy of undying faith. I don't see any warning signs either. It's still too early for me to have a strong opinion of him one way or the other. .
They are already close enough in the AL Central where they should be making moves that can help them win next year. They can't keep rebuilding forever.
I don't either love him or hate him. When he first signed, I wasn't really excited, but I felt he was a big upgrade over what they had. After seeing him, I still don't like him but I don't hate him as much as others do because of his defense.