Here are some little tidbits I picked up along the way
Imaginary friends do not have to be turned into real sims, they can but its just an option. I am not sure if it was in a video or an interview I read but it seems that 'insane' Sims may keep their imaginary friend. Whether they disappear for everyone else remains to be seen.
We will have to choose between a bachelor or bachelorette party for each engagement.
The chemistry set can be used for good as much as bad.
The Rebelious and Nurturing Traits, will assist sims throughout their lives and not just in the life stages that have been specifically mentioned.
Elders will naturally dislike children and teens and be grumpier regardless of their traits.
KJ