I can't see myself cutting Decay entirely, but I could see trimming it down. I still think it has its uses as a random catchall. After some tinkering, I think I'm going to be going down to 1 Decay main, 1 Decay SB. Caveat that since I'm going on vacation soon, I won't actually be able to test this for a month, but this is what I'm thinking:
Creatures
2 Baleful Strix
1 Cavern Harpy
3 Coiling Oracle
4 Deathrite Shaman
2 Dream Stalker
1 Eternal Witness
4 Imperial Recruiter
2 Leovold, Emissary of Trest
1 Parasitic Strix
2 Shardless Agent
Spells
4 Aluren
4 Cabal Therapy
1 Abrupt Decay
4 Brainstorm
1 Fatal Push
3 Force of Will
Lands
1 Bayou
2 Forest
1 Island
4 Misty Rainforest
3 Polluted Delta
1 Swamp
1 Taiga
2 Tropical Island
2 Underground Sea
2 Verdant Catacombs
1 Volcanic Island
1 Wooded Foothills
Sideboard
1 Abrupt Decay
1 Dread of Night
2 Engineered Plague
1 Faerie Macabre
1 Fire Imp
1 Force of Will
1 Harsh Mentor
1 Izzet Staticaster
1 Magus of the Moon
1 Minister of Pain
1 Null Rod
1 Pernicious Deed
1 Reclamation Sage
1 Scavenging Ooze

