So somehow, to include a pitchers fielders, where the ball is hit is significant, and that the fielders UZR (or something), should be factored in. So a hit to left field with Melky there would be worth less, than if that same ball was hit to left field with Rajai there. But only if the ball was hit within Rajai's range. An out becomes a hit simply because of who was the fielder. I understand, and yes, this should be part of the equation.
So you'd literally have to look up every hit a pitcher as given up, what zone the ball landed in, who the fielder was in that zone and where the fielder's range fits in correlation to where the ball landed.
So that 0.884 value for a single, for example, could fluctuate depending on where the ball was hit who the fielder was. The value of the hit could be devalued by a matter of a couple feet. A Fielder's yellow zone to red zone.