By all means give the kid reps at 3rd in camp and with the taxi squad. But it doesn't look like Vaughn has played a single game at 3rd in his college or pro career so far. If worst case Moncada doesn't play (hypothetically), then perhaps you take a chance that his bat covers for his lack of reps on D. Just doesn't seem likely to me.
I hate spiders so it would be quite fitting to match my general level of disdain for all things Cleveland sports.
They could call the team the Taint Lickers for all I care so long as the racist cartoon logo is put to rest forever...