It seems that ‘vacuous’ is being used here to indicate questions-remain-unanswered/instructions-are-not-explicit-enough? All high-level/aspirational objectives leave room for interpretation. The question, How is our service distinctive to GW as opposed to any old university will help all staff strive for a higher goal. That’s as vacuous as a question like, What do you want your life to have looked like on your deathbed, ie not at all IMO
This is still vacuous and not very applicable.
"remarkable and identifiable to GW" which means what?
"change a young student's life" in what way?
"to change the world through it's teaching" to change the world how?