Add to that the fact that Leovold was banned in EDH and therefore for the set to maintain even its current value, something else will have to grow and some of the cards are taking a lot longer than expected to move at all, or even become adopted (Im looking at you, Regal Behemoth)
And, if they do block, you can eventually get that trample payoff, too
While initially designed as an aura that wasnt nigh-guaranteed card advantage, its proven far more flexible over a decade later in sets like Aether Revolt (where it enabled Revolt) and Ultimate Masters (where it was quite strong alongside Heroic).
What makes the eye evil
While Celestial Colonnade is the classic WU creature land, we also have Restless Anchorage, a slightly smaller flier
3 Mendicant Core, Guidelight Copy Everything A cheap commander perfect for an artifact-based deck, Mendicant Core, Guidelight is a fantastic little Robot that can do a ton of work in a game