Teams have won and gone to SB's and even more have reached the championship game without a great QB. However, in today's NFL if you don't have a elite or very good QB your at a significant disadvantage when going against your opponent who has a elite QB.
However that doesn't mean Eason cant be a excellent QB. I have no idea if he'll ever make it as a starter or not. He's played only 1 season in college because of losing 1 season due to injury and another by being a transfer. But he has the tools, size and a Big arm, and thats something you can't teach.
I personally like the pick and his potential.