All I can say is I guess one practice (ie Spring Game) is only one practice.
Personally, from the tiny bit I have seen, Bridge would not be 2nd, and Isi/CJA would be flipped (though at RB it is not as big a deal who "starts").
Anyway, there is a long way to go, and a lot of informal and formal coaching and training to be done...
Edit; interesting that the holder is not Bridge or Maynard... I wonder why. I cant remember the last time the holder was not the first or second QB. (Or am I ignorant on what HLD means?)