Being able to have my heir be a leader makes sooooooo much more sense, so thanks for that. I'm loving it.

However, I just got the event where a leader becomes psionic which targetted my heir (they were given leader_trait_ruler_psionic). The event didn't give the respective leader traits for governors/admirals/generals/scientists though, so you might want to dig-up the event and edit it to do so (each leader type has their own trait that needs to be given; pretty sure it's utopia.2605 , which only triggers if the species has the latent psionic trait).

Upon investigation of the save file, there appear to be two leaders by the same name, one which was given the psionic trait and one that wasn't. The one that wasn't is the one that matches the leader ID I see as the heir in-game. (Is your mod making a duplicate leader that isn't accounted for by the event?) They also stand-out by having odd characters in the name:

name={
first_name="HPerak"
second_name="Tysala!"
}

(Notepad++ says those are DC1, as in ASCII device control 1...odd EDIT: I see those are just slapping it with colour. I didn't know how the game handled colouring strings at the time I wrote this.)

Otherwise, the mod works swimmingly.