With their knowledge of time-space continuum, druids gradually learn more and more about various nuances of subspace. With this skill they are much less prone to various mishaps and errors which may occur while using some magical means of transportation. Whenever their transportation spell loses tracking, they can return it back on track via their subspace cordination. Or, in case it is not possible for some reason to reach the destination, subspace coordination at least prevents missteleport and stops the spell alltogether.