When Lt. Gen. Robert Caslen took charge at West Point, he declared war on mediocrity. “I need to work all across West Point to build this winning culture,” he told Military Times in 2014, about a year into his tenure as superintendent (which ends Friday). “Mediocrity … it kind of bothers me. These kids, when they graduate, are going to lay it on the line. If they’re surrounded by mediocrity, we’re not providing them with what they need. “Whether it’s mediocre tactical officers, mediocre instructors, mediocre coaches — you know, wherever that mediocrity is, that’s something we’ve got to address.…