That's all. Most of the time, I would change a card like this to say "All creatures you control", but the original casting cost of Aysen Highway comes with a triple white cost. It's supposed to be a stressful card, and changing that, I feel, would alter a fundamental point in this card's design. Even the art supports the theme. The Highway runs in both directions (The art is a little zoomed in here, so it's tough to see, but it's still there.)

Gatherer features a lot of complaints about this card. But I figure many of those complaints would die down if the ability was aggressively costed. Aysen Highway isn't supposed to go in every white deck. It's supposed to go in aggressive white decks to tackle control white, or good stuff decks with a few white cards.