We know that trees and lists are useful only in handful of situations. We are discussing approaches to be more helpful to our users and "someone else's product"'s way is one of the things we keep an eye on. We are also researching other ideas. We aim to include at least one huge usability improvement in every Q and this is one such feature. But we are a small team and have so many great ideas to implement ;)
I promise you that in one way or another, the trees will step aside to a more humane presentation. But we may not be able to do this for our next Q.
the Telerik team