I have one concern - the loss of Devin Smith. From my limited POV, it takes someone like Devin or TG Jr. to be the instant score threat from anywhere on the field that forces defenses to concede space in an attempt to insure protection against the deep threat that makes everything else work. e.g. as I watch the MSU, Wisky, 'bama and Oregon games, it seems to me that it is the threat of Smith that opens up the middle to Marshall and the run game.
Brax has shown the ability to score as a scrambling QB, but I'm not sure that correlates to being a wide out that forces defenses to play deeper.
I'm sure it creates problems of some sort, but I'm not sure it forces the safety's deeper or the corners out of blitzing or coming up fast on runs.