I'm not seeing the Wright/Steve Smith comparison. Everyone says he's strong, but I don't know how anyone knows. I don't think he's ever faced press coverage in his life.
So few receivers do in college. One of the reasons projecting them can be such a pain. It makes it especially hard to get a read on a guy like Wright who has significant size limitations. I still like Wright a ton though.
If Eli were about 3 or 4 inches shorter with a weaker arm.
Eli doesn't exactly have a "cannon" for an arm. But both him and Barkley can throw deep just fine. More about timing and touch. Arm "strength" is overrated and can have different meanings anyway. You don't need a rifle like Cam Newton to succeed.