I spent my early years watching the Nationals never thinking twice about Pat Listach, Bo Porter, and Trent Jewett. Occasional strange send call, but I never once wondered if they were "good" or "bad". More often than not, their decisions made sense.
Bob Henley must be a genius behind the scenes, or the Nationals analytics staff must believe conservative third base coaches are an MLB inefficiency. Henley has had four managers keep him around and in that role, other than his brief stint last year at first base.
I've spent over half a decade either in the Park shocked seeing his send calls or watching TV and mentally thinking after a hit, "This will set Nats up 1st and 3rd!" a half moment before Bob Carpenter or FP screams about Henley sending a runner.
It has to be an organizational approach at third. There is no other reason four managers have allowed who knows how many Nats runners get thrown out at the plate with a few steps to spare.