Verne's promotion raised and hosted some of the best talent in professional wrestling. I think Vince Jr. lured more talent from the AWA than any other territory.
To me, Verne is a lot like Vince, in that lots of people feel very strongly one way or the other about him. Vince may have been a little more shrewd, and his MTV mentality took the business to the next level. But, Verne Gagne was a MAJOR player, whose role in the industry is undeniable.
Without the AWA, there may have never been a WWF, and the business may have dried up and gone the way of vaudeville.