I wouldn't count him out so fast. The season is long and 1 injury to a WR could put him into the rotation if he makes it out of training camp. This report is making it seem like he has a grasp of the mental part of the game, if that proves true then a 6'5 slot guy could be a great target near the end zone or 3rd-and-whatever situations.
6'5" guys don't play in the slot...they are out wide for fades in those situations. Regardless, you don't make a team based on the potential of injury or the potential of what he could do. They make the team based on what they have done in practice, hard work and intangible things...such as situational football and football smarts.
Does Turner possess any of that? I don't know, I'm not at practice, but my instincts tell me he'll be looking for a job come August.