More Trait Slots?

I often wish the Sims 4 team would give us slots for one or two more traits, for children and teens as well as young adults, adults, and the elderly. Is there any mod that accomplishes that? More traits would equal more complex and interesting Sim personalities and that could never be a bad thing. So if there isn't a mod that provides Sims with extra trait slots, could one of you geniuses create one? Thanks to all!