I don't buy into the "everyone can do what he does better comment".
Abby is a sharp route runner. He could use more speed and might get cut. But he runs much sharper routes IMO than Janis, and Adams. I think Adams routes last year were sometimes lazy and sometimes piss poor and MM gave a long leash to fail, and he used every bit of it. Had MM given him a shorter leash and Janis and Abby more opportunity it may have been a good thing. Janis is fast but runs shit routes and still can't be relied on.
As a route runner, I was also very impressed with Montgomery's sharp routes as well and he picked up our offense very fast. He was a HUGE LOSS. Jordy is our best route runner IMO. Cobb is great improvising and runs decent routes as well. Who knows about Davis.
I can see Abby getting cut or making this team and contributing this year.