After seeing Eldrazi absolutely demolish the Modern Pro Tour, I think the advocates of Eldrazi in Vintage have a much better argument. In particular, I don't think I realized how broken Eye + Mimic; actually is... they become Ornithopters that hit for however hard you cast dorks on turn 2. That's a respectable clock!
You could certainly engineer a Vintage deck that runs 4 Eye of Ugin and 4 Eldrazi Mimic, but it would be a very linear - almost entirely - creature based deck. Eye of Ugin breaks the fundamental rules of the game now that Mimic exists, generating as much as 14 mana on turn 1 (On the draw, you drop 4 eldrazi mimic and 3 endless ones for 2). You could play some Stifle/Phyrexian Dreadnought package to go alongside it.
I'm all for trying out different things, but I'm going to keep on tuning this Black list because I think it's very good.
*technically, eye can generate 16 mana on turn 1 in vintage. Lotus, Ancestral Recall, 4 Eldrazi Mimic, 1 Endless One for 4, 3 Endless One for 2)