The key is to keep him in the same role where he has been very good. Some teams might try to expand his role (routes), but that Is a bad idea, IMO. The Cowboy actually gave him some of the TWilliams routes in the preseason and it was not good and included an INT, IIRC. It's not his fault, but the radius for the QB to hit a guy his size on deeper routes is just too small unless it's a guy like Desean Jackson that can get big separation with his deep speed.
Beasley's primary competition for playing time is oddly, Escobar. If they use the package with Escobar, then Beasley is likely not on the field and vise versa. I would like to see more from Escobar but I don't want to see less from Beasley. Every year I expect Witten to quit playing 100% of the snaps, but it never happens. I guess maybe they could get both Escobar and Beasley on the field in those empty backfield set they like to run which is normally 1 TE and 4 WRs, but could be 2 TEs and 3 WRs.