3) I ran the Contagions in the maindeck not to answer a problem in Game One, but rather in an attempt to squeeze all of my answers in the sideboard. The Contagions made the maindeck by simple virtue of being the only free spell and therefore the only one castable in Game One.
Daves point here seems important, and relevant to some of the discussion above.
If Ichorid players are adapting to run some sideboard cards in the main, the deck must be losing some of it's game 1 power. If it gives up too much game 1 power, and still can have problems folding to Layline/Jailer/Crypt games 2 & 3, then the deck can't be totally overpowered.
Not all players will want to run Ichorid to start with, but will we see the players that enjoy the deck try tune the maindeck so they can survive vs hate? Ultimately causing the deck to become more 'fair'?
(Flash is a different topic)
---Korhil