Wait, is it not just five mana on turn 4? T3: morph face down, T4: morph for {2}, netting {G}{U}{R} + two untapped lands. Am I missing something? Oh, you tap it after you morph. I see.... interesting design indeed.
Yeah, I mean I see what you're saying. Part of the key was dropping the power level so that the baseline power requirements were lower. It's also structured much more like a retail draft set than a traditional cube.
I actually think Lucas has some good points here. But what they fail to provide to me are any compelling reasons to run the cards. "It's not that bad" isn't the form of defense I'm looking for.
I think generally draft environments want cards with a higher base power level. Relying entirely on synergy is basically a death sentence for a cube card. I'm sure you can find exceptions in the posts below. :p