Courser was awesome for me all weekend, but most of my losses were heavily influenced by mana-related issues
At best, you have Actions like Mother Knows Best and Dragon Fire but those dont always see play

Acceptable Losses An-Havva Constable Bargaining Table Bayo, Irritable Instructor Bronze Tablet Cephalid Constable Charitable Levy Chromium, the Mutable Constable of the Realm Copper Tablet Desert of the Indomitable Division Table Indomitable Ancients Indomitable Archangel Indomitable Creativity Indomitable Might Indomitable Will Inevitable Betrayal Inevitable Defeat Inevitable End Inscribed Tablet Intrepid Stablemaster Isperia the Inscrutable Mona Lisa, Ever Adaptable Mutable Explorer Portable Hole Reputable Merchant Rhonas the Indomitable Stern Constable Tablet of Compleation Tablet of Discovery Tablet of Epityr Tablet of the Guilds The Indomitable The Unbeatable Squirrel Girl Turn the Tables Uncomfortable Chill Unpredictable Cyclone Unstable Amulet Unstable Experiment Unstable Footing Unstable Frontier Unstable Glyphbridge Unstable Hulk Unstable Molecule Suit Unstable Mutation Unstable Obelisk Unstable Robot Dragon Unstable Shapeshifter Wickerfolk Indomitable Yidaro, Wandering Monster

Thats where Rodan shines as he allows for them to return, plus with removal in the yard, you get to destroy or exile something every time Rodan mutates (as long as its CMC 3 or less that is)
Weve seen clone effects before, but Koh bypasses the graveyard entirely, exiling threats and keeping them in his collection forever
The problem goes further than that though