Well, the guy has a lot of physical ability and a good head on his shoulders. He was in line to win the spot last year before he got hurt. I would certainly give him one more preseason and camp to see if he can stay healthy and contribute.
Remember Landry's 3 year rule. He always gave them 3 years. If you give up after two, he said you would end up letting some good players go... but if you held on four, you were probably wasting your time. This will be Matt's third year.
Physically he is just about as good as anyone so I really hope he stays on the field.
I try to look at it like this: He will be like another rookie coming in except he has two years of watching and learning in the NFL, and specifically, one year learning and watching this Marinelli defense. Two offseasons. Two training camps. Two years in an NFL strength program.
Johnson is a smart guy and I have no doubt that he has picked up a ton since arriving. He will be way better prepared than a typical rookie. Now he doesn't have what was about the only negative he had coming out of college, which is coming from a small school and having to adjust to the NFL. Now he is better prepared mentally than any rookie, no matter what school.
Johnson has size, plenty of physical ability, speed, quickness (remember his ridiculous 3-cone times) and a knack for creating turnovers. If he stays healthy, I don't think there is much doubt that he'll win a starting spot and be a big upgrade over what we had last year... but the question is: can he stay healthy?
I'm certainly giving him one more chance to prove that he can.