When editing vertical alignments. When I want to edit a complex vertical alignment by adding or removing elements I usually use Drop Complex Status because I find it easier to edit those single elements than edit apart and then use Complex Redefine. But when you use Drop Complex Status it also remove the feature definition.
It whould be good if the feature definition wouldn´t be removed so you don´t have to set the feature definition again. The same goes for horizontal alignments when using Drop Complex Status.