If you're the manager and trying to extend a pitcher to something he's not use to, first, his pc should be unusually low, Scherzer's wasn't. Next, you need to consider the opposing hitters. Unless it's a particularly weak hitting team, they shouldn't be at the top of their batting order, the Marlins were at the top of their order and are a good hitting team.
Unless there are multiple injuries in the bullpen that they're not disclosing then sending Scherzer out for another inning was just poor decision making by Williams, especially with an off day today The Nationals bullpen have pitched among the fewest innings in baseball plus the team has played among the most games in baseball. Conversely, Nationals starters have pitched among the most innings in baseball.
Williams seems to just not be very good at multi-level thinking which is why I don't think he's well served by his coaching staff. I don't think the staff has a good thinker on it either. He needs to higher a coach who's a good thinker and he needs to listen to him for his in-game decision making.
