It's interesting in that it acts as both an answer to Blightsteel and as artifact removal against Workshops. I think it's overpriced though, and I think overall Steel Sabotage is better. Or for the decks wanting an effect like this, Leonin Relic-Warder is another option.
I'm not sure I agree with it being overpriced. It is a cross between Disenchant and Revoke Existence. It loses enchantments but gains Red hybrid. Really, the only relevant enchantment in the game is Oath, and Red doesn't have an answer to the enchantment aspect anyway.
Good find.
This card should see some definite use in hate bear decks in main deck and/or sideboard. Answering tinker and getting the extra versatility of exiling noncreature artifacts will be handy in those decks. In blue decks, the lack of blue in its casting cost will keep it from widespread use, but could still see some application. Fringe playable.
Like I said in the original post, I think it gives Grixis decks a huge main deck gain. It is a tutorable answer to BSC, Key/Vault and Shop. No card in red has been an answer to all three threats (save Into the Core, but that isn't played anyway.)
The fact that it is Red and Instant is certainly useful, but I put this about on par with Revoke Existence. You gain an easier casting cost and speed, but lose the splash hate against Oath. I guess it basically is a strict upgrade on Shatter, but no one uses that anymore anyway. I don't think it's as good as Smelt, generally. Nor as good as Annul or Steel Sabotage. Still, it does work.
In a White deck, it is on par with Revoke, however in a Red deck, it is clear better than Revoke. Again, Red never had an answer to the enchantment, so losing that part over Revoke is a non issue in Red. Again, the power of this card comes from the fact it answers BSC and other artifacts. Up until this point, we either bounced BSC or we destroyed other problematic artifacts. Now Red has a way to permanently deal with both.
I plan on playing multiple of this card in my bomberman sideboard. It's really just a slightly better Disenchant, as I've never once used that card to destroy an enchantment. Nothing to write home about, but it's worth noting.
Or maybe I'll just play Disenchant anyway, because I like the art better.

In white, I think a combination of Disenchants/Shattering Blow is the way to go. The enchantment destruction is relevant from time to time, but the instant speed artifact removal is the the bulk of its use (however, not against BSC).
I think shattering blow is playable in vintage.As Draven said,it is similar to hurkyl - artifact hate,including tinker golem!
I agree with your agreement.
