I’ve been playing around with the new mindmap view which is very useful.
One usage that I made of it was to build a family tree for characters. Not sure if this is still relevant for a software like Timeline, but if it is some adjustments would make it very powerful.
Some that I can think of at the moment :
another type of arrows that would stick to vertical and horizontal angles such as this suggestion Mind Map Suggestions - #8 by ErsatzLord
automatic operations on relationship items. For instance, if the gender of a character is an existing property, change “child” to “son” or “daughter”. Items currently support plural, but not gender.
Auto-check dates consistency. Displaying a warning if a child is born before parents, for instance.
There’s probably other things to take into consideration, but I find it already super useful. It helps a lot not messing up with dates.