They've kept Roby not for his return skills but for his talents as a Special Teams gunner. But we've never been this deep at WR in the Brees era. I don't think it's a lock that Roby makes the team.
If Roby stays, we keep Parker.
However, it wouldn't shock me if we cut Roby and kept Parker and Tanner.
ETA: Exactly what Coco said.
This post was edited on 8/20 at 10:55 am