That's a really good idea, several outsider templates for different gods or less powerful outsiders. I mean someone with a trace of succubus shouldn't have a -2 charisma. In no way should they have the same stats as someone descended from a Balor or Pit Fiend, but now they do.
Lets see what few types would be needed (just archytypes) These templates could be stacked to create devine ofspring (or those of very powerful outsiders like solars). For example a descendent of Hextor might have the Evil:Combat and Lawful

omineering templates. While Kord might have Good:Crusading and Chaos

estructive
Evil:
Cunning, deciteful, magical (Quasit, Imp, Osyluth, etc)
Alluring (Succubus, Erinyes, etc.)
Combat (Kyton, Barbazeu, etc.)
Lawful:
Domineering (Efreet, etc)
Organized, obediant (Formarians, etc)
Good
Benevolent (Ghaele, Astral Diva,etc)
Crusading (Solar, Planatar, Hound Archon, etc)
Chaos
Destroying (Slaad)
Unpredictable, free, random (Djinni, Titan, etc)
These catagories might have slight variation in spell like abilities base on the specific parent. Ex. a Kyton could animate chains, while another feindish combat template might have a different ability.
Do you think this has potential, and would anyone like to see it if I write some stuff on this up?