Note that Frozen goods card gives you indication if Frost keyword was triggered and what card rarity was replaced. Crystal seal also indicates card rarity when drawn by opponent.
By this, I assume you mean to suggest that both cards will be Revealed upon their appearance in hand as both players will know exactly which version (rarity) of the other was drawn by looking at their own.
Fronzen goods card will be revealed, but the Crystal seal card will not be revealed when drawn. This is because the Frozen goods card serves as immediate keyword effect indication for both players, while Crystal seal informs only the player who drew it as his opponent has no way of knowing if it is a Crystal seal card or not.
Of course this gets little bit complicated later because for example once all rare cards in the deck are replaced with Crystal seals they should be revealed once drawn. Unfortunately, we currently don't have the "context" information when drawing cards so we can't reasonably implement this at this time.
Oh, and I should really add a new "Freezer" achievement :D