There is one feature that I would find very useful in checkvist. Often while editing an element I would like to convert everything to the right of the cursor position into either a child element or a sibling element.
ithoughtsX, a great mind mapping tool solves this in a masterful way. By pressing tab while editing an element, whatever is to the right of the cursor becomes a child element.
By pressing command + enter, it becomes a sibling element.
It would be really useful for me, and I suppose for many others, to add this behavior to checkvist