I'm in the minority here, but I like Allen and think he can be a good if not great QB at the NFL level. Folks say you can't teach throwing mechanics at the NFL level but I disagree. You change patterns with repetitive work and maybe his change is minor. Pro golfers do it all the time - look at how many times Tiger Woods has changed his swing. Matthew Stafford has made the adjustment just fine and improved his accuracy.
I'd rather have the humble farm kid from the small town with the big upside than Baker Manziel ( I need a reality pre-draft show), or Josh "Hot Tub" Rosen who's a big head hit from being out of the league, or small hands whirlybird Darnold who has not played much in crappy weather.