Wpa is literally RBI, only fancy. It is exactly what you argue for all the time. I'm really baffled by this statement.
https://blogs.fangraphs.com/i-think-win-probability-added-is-a-neat-statistic/
Martin should start in center. Or first. Yes, this is aggressive, but I'm trying to win. It might not work, but this team isn't winning it with luplow and Gallo playing full time.