This starts a trend that affects basically all of the Tarkir: Dragonstorm new abilities: they were printed only on a handful of cards, which makes them artificially niche and obscure
Bouncing permanents is far superior to bouncing creatures, and bounce spells that are cantrips are far superior to ones that are not
Considering how good some decks are at drawing extra cards, I think this is both high-risk and high-reward
For just 1 mana, it provides steady card advantage through Clue tokens and doubles as an artifact enabler in affinity-style decks
However, Urza will be teaming up with a much more reliable planeswalker threat to keep control afloat: Teferi, Temporal Pilgrim
Similarly, if an effect attempts to put a modal double-faced card onto the battlefield transformed, it will enter transformed if its back face has a permanent type