Was Thalia too good for standard? What about spirit of the labyrinth? These are the types of hate cards that see play in legacy against the fair stuff that snow does. 2 cmc white creatures with ability text and maybe a combat keyword. That's all they needed to do and it would have been great for the format.

Make it white so delver won't play it. Give it first strike and, "snow permanents enter the battlefield tapped." Instantly it's a playable card that doesn't remove an archetype. People would still play snow but the tempo loss of your second land and possibly astrolabes and coatls coming into play tapped would make you consider playing non-snow control again. This is a card that would not have been to strong for standard either.