Well, actually I'd say most Veigar players would start out as playing "farming" Veigar, but after getting familiar with Veigar's capabilities would eventually switch to a much more "dominating" style. That's how it went for me, and all of the Veigar players I've played against and researched after (aka STALKED on op.gg and lolking (lol)), or have tutored all seem to have followed that trend as well.
Playing the more effective dominant Veigar is difficult without understanding him front and back and not yet having mastered landing E, so I'd even go as far as to say that is the preferred learning curve for old Veigar mains.
Clearly by this logic no one on Riot's balance team was at the dominant Veigar stage.