I feel like a more measured approach is better. I agree that this card is not Vintage playable. However, it's not "utterly worthless." I think it falls into a category of cards that are actually quite powerful for what they do, but you just can't justify running them over something else. Like I said earlier, this card is 22 damage if you cast it and flash it back with just two Monk tokens in play. That's a powerful effect. If you really wanted to, you could stick it into your Vintage deck. You might even win sometimes with it.
No it's not powerful. You're using multiple cards (this and a Snapcaster) and 6+ mana for a win more. Even that new red Regrowth is way better than this. The only way this is remotely good is if you find a combo between this and a 10 damage spell, but I highly doubt it... =/
The only time I could see this card working was when the format was split between Pyromancer and Griselbrand decks so you could side this in to try and punch through a Griselbrand for the win. Even then, talk about narrow use.