Now sure, that puts Rust Tick into the library, but where it needs to end up is the graveyard
maybe you milled it, maybe you surveilled it
Unless you predict the game is going to reach its conclusion by running your opponent out of cards, those cards could have just as easily been on the bottom of your opponent's library and the result would have been the same
Sure, some decks will be able to maximize the card usage, but will it even be worthwhile, or will there be more efficient payoffs to use

Cait Sith, Fortune Teller Capricious Sliver Case of the Burning Masks Caves of Chaos Adventurer Chandra, Flameshaper Charforger Chase Stein, Runaway Cleon, Merry Champion Commander Sofia Daguerre Compleated Conjurer Cori Mountain Monastery Count on Luck Court of Locthwain Crimson Caravaneer Crimson Operative Cunning Rhetoric Daredevil, Man Without Fear Dark-Dweller Oracle Dogmeat, Ever Loyal Duchess, Wayward Tavernkeep Elemental Mascot Elkin Bottle Emberheart Challenger Embodiment of Flame Endrider Spikespitter Equilibrium Adept Experimental Synthesizer Fire-Brained Scheme Fireglass Mentor Fires of Mount Doom Furious Rise Galvanic Relay Geistflame Reservoir Ghost-Spider Gila Courser Gloria, the Great Armorer Goblin Researcher Grotag Night-Runner Gwen Stacy Harnesser of Storms Hedron Detonator Heroes' Hangout Hidetsugu, Devouring Chaos Hotel of Fears Intet, the Dreamer Inti, Seneschal of the Sun Irascible Wolverine Ire Shaman Jaya, Fiery Negotiator Junk Jet Junktown Kami of Celebration Kellan, Planar Trailblazer Kulrath Zealot Laelia, the Blade Reforged Lightning, Security Sergeant Magmatic Channeler Mind's Desire Mishra's Research Desk

Unless Crustle can pull a similar upset, Mist Energy will likely continue to drop