I believe Johnny Manziel will be a NFL bust akin to RG III or Tim Tebow.
I really don't know. As quick as I am to give an opinion, I'm at a loss on this one. He could be a bust or he could be a star. I think if he gets with the right team he could do quite well. If he has some good running backs and some tall receivers, I think he'll do well. And a lot of it will have to do with how well he manages the NFL life and all the trappings that come with it.
I'm not a Tebow fan (nor a hater), but I still think he could be a good QB with the right team. The problem is that the NFL isn't interested in developing talent. If you can't be effective immediately, they don't have time for you. One of the many reason why I prefer college football, where they recruit potential and invest in it over three or four years.
Tebow could be effective in the CFL, or at least enough to have a team give him a shot
That said, going what you're saying Gebre, the NFL NEEDS a minor league system. If you can't be effective, then send them down into the minors and let them develop their talent, just like they do in any other big four sport.
Speaking of which Gebre, have you watched the CFL? Great game, and way less egos because of how little, relatively speaking, they get paid. They rebroadcast the TSN feeds on a couple networks, including NBCSN. Great game.