1. Those who designed WAR are certainly NOT running every front office in baseball.
I think it's fair to say every front office in baseball is currently looking at, and using, quantitative ways to evaluate players. I seriously doubt ANY front office pays much attention to WAR. I'm willing to bet a large sum of money they have better methods than, at the least, something still relying on crude defensive measurments such as UZR.
2. Ichiro Suzuki, OPS+
2001-2010: 126, 120, 112, 130, 113, 106, 122, 102, 129, 113
2011-2017: 86, 93, 77, 89, 58, 102, 79
I'll leave off 2018 and 19, very small sample sizes, but it got worse, not better.
I stand by my assertion, Ichiro was a below average MLB hitter over the second half of his career.
3. Polanco, Sano and whoever were introduced by proponants of Arraez, I understand why you don't want them in the conversation, though. Arraez doesn't hold up well in comparison.