I would like to see more flexibility on which lessons can be linked to each other.  Right now, I can create links between lessons in the same manual.  I would like to see this enhanced to be able to create links between lessons in the same space, but not necessarily in the same manual.  As it is now, we are creating extra "appendix" chapters in our manuals to hold lessons that we want to link to, but don't really belong in a specific chapter.