I agree it's pretty minor -- for this year. It really benefits the team longer term where they can stash a player they want to develop (like an Dietrich-Smith or Tramon) and give a fair shake to next year. Maybe that Vujnovich or whatever becomes the swing tackle of the future.
With the folding of NFL Europe there really isn't a developmental league and with all the injuries GB has had I like it. Gives young players a chance to learn without being thrown in the deep end and killing a team.