I personally believe that they had Wilson play guard all year to give him reps in the league without the responsibilities of center. Now in year 2 he has those reps under his belt, knows how to be a starter and prepare as a starter, and just has to focus on (re)-learning the extra responsibilities of being a center and spending some time in the gym getting a little stronger and working on his conditioning. If Wilson beats out Bradbury (and I would hope he can), they will cut Bradbury and let him catch on somewhere else.
Same for Campbell but he just has to focus on his strength and ability to handle power rushers. Pre-injury, he was able to handle guys who had speed and guys who had power but not guys who had a little (or a lot) of both. But that is not that crazy for a guy who is so young. He can absolutely improve his game in that regard with a couple of years of NFL conditioning. It's not like the DEs he was getting beat badly by were 22 year old rookies, they had had that time to develop their games.
So yeah, I think otherwise you go into the season that way, leave the right side the same but scout some potential tackle depth, and probably draft a left guard and sign a left guard and see how the chips fall. Worst case, Ben Brown starts, but hopefully you find a higher tier player.