That is a very good analogy MM. And like you said, EOT mystical or vamp for w/e, EOT brainstorm, or with jace on the board, these guys become 3/2 flyers very quickly. Also since its a may effect, if flipping him dont change the game state, you can always keep him a 1/1 despite the fact you just drew a counter to keep your opponent off guard!
In this case I would have to say DoS's ability to peek at the top card holds more value than turning into a 3/2 flyer.
I mean with Jace,TmS out, you could just have Aven Mindcensor and win from there.
Every card you have is better once Jace The mindsculptor is out...just saying.