This is a horrible argument for a lot of reasons, primarily that when someone topdecks a good card, unless they explicitly tell you (or their hand was empty and they immediately cast it), its basically hidden from the other player. Moreover, Magic is mostly played by people who play it for fun, not Brian Kibler. Does Aaron Forsythe (head developer, standing right behind Kibler) look like he's thinking "wow what a great mechanic!" Hell does Brian look "composed"? Really? Does LSV? No, because Miracle is bullshit. Opponents topdecking shit is infuriating to begin with, which is fine because its hidden - mechanics that reward your opponent for topdecking shit beyond the card being good in and of itself is horrible game design.
Miracles
-Are polarizing but generate a lot of excitement and made for some memetic moments
-Likely helped sell Avacyn Restored - a set that sold really well
-Contributed to the creation of new decks (see Legacy)
-Didn't break any format in half
Miracles are not what I'd call a "good" mechanic but I have no idea if they would comeback or not but I doubt Forsythe is lost sleep over it
Avacyn Restored had a lot of cool cards. Restoration Angel, Grislebrand, Avacyn, the Powerpuff Girls, Cavern of Souls, Cloudshift, Silverblade Paladin, Vexing Devil, Deadeye Navigator, Misthollow Griffin, Desolate Lighthouse, Tamiyo, etc.
It was just a really bad limited format.
I'll agree with this.