Bo tends to go in defensive slumps where he makes a bunch of mistakes and his metrics have a tendency to plummet as this occurs. I hope that it will be possible to track changes to the metrics a little more easily at some point in the future to make it easier to quantify the drops to the various metrics once the inevitable slump hits.
I think his arm strength has never been much of an issue, I believe his issues stem from poor mechanics at times that leads to the errant throws. We shall see how the range looks this season after the barrage of calf issues last season, hopefully that hasn't been overly affected.