While I agree, the counter argument is to play players in their best position even if they are versatile - that's what we hear every time we see an England team selection.
The players need to be able to perform their primary role first and foremost - I'm yet to see what Barbeary is like at hooker at senior level.
Odogwu always looks busy even when he's not going anywhere. Is he a quality option at wing?
Obviously Jimmy is Mr versatile, and Lima seems more assured at 15 than 10, so I don't know if that's versatility or a new position
Versatility is great, but do you primary job to a top standard first