I think you guys are not looking at the full pattern here. The boundary A back runs a wheel. When we run wheels, they're basically always deep routes trying to catch a man coverage LB in a footrace mismatch. (and wheels are probably Johnson's favorite route IMO) The WR runs a hitch, and sucks the corner and safety into both guarding him. He's occupying space. The field side A back runs a shallow cross at the sticks, and he dorks up his route. If he runs a crisp route instead of lollygagging then he's wide open for an easy first down, but instead he starts trending back into a deeper area and ends up clogging up the same area the WR is in, basically neutralizing them both.
There were no missed WR reads on this pattern. I'm not sure there were any reads at all. It's just garbage route running by the field side AB.
Now, there's a question about who the hell TM was throwing to. I can't figure that one out at all. But it's not a WR read. The spot he threw to would have been open for the wheel about four steps earlier, but certainly not when TM threw the ball. If he was going to hit the wheel later, he should have waited another second or two to throw it, or put up a fade if he didn't have time.
If the field AB runs the proper shallow cross (a pattern about 4 yds deep) then he gets the first down on the catch and probably gets about ten more YAC.