This mod allows you to continue playing as your non-primary heir when you die.
You could of course use the menu to change your character, but if you're playing modded ironman (i.e. to prevent yourself from cheating) or if you want the option to continue as someone else feel more like an actual game mechanic, this mod is for you.
For this, the 'you are dead screen' has been changed and the section 'lost titles' now gives slightly more information about the pretenders and most importantly allows you to play as your siblings.
Thanks to various people on the forums for giving me the idea. I think this concept makes playing with the partition succession much more interesting, because now it gives you the 'benefit' that you can play as your favourite kid (but without inheriting all the titles).
It is also quite interesting to play as 'the little brother', scheming to take his rightful throne. In vanilla CK3, you'll never be in that situation as you will always continue as the most powerful child. This also makes it so that forming a cadet branch is a rarity for the player himself.
I also added a "random child" button, which will randomly choose one of your previous rulers landed (tier >= count) child of your previous ruler. Just in case you want to restrict yourself from min-maxing. ;-)
Maybe one day Paradox will just add this feature to the game, but until then have fun with this mod. I really hope they do so, you too?