The receiving group may be better than most of us expect. Presently there are 11 International receivers on the roster--5 of them were drafted by NFL teams. Also 5 have played multiple games in the NFL--3 of them more than 20 games during their time in the NFL. When you add Green, who has been an exemplary East Division and CFL All-Star player, there is some reason to be hopeful.
If these players have a modicum of their previously demonstrated talent, we might have a reasonable receiving crew. One player who impressed in the 4 games he played last year, was Posey. He has size (6' 2"/210) and speed (4.39). He ran sharp disciplined routes and appeared to have good hands. If he has kept in shape and is motivated, he could be an asset to the team this year.