Sims 4 Life & Death Gameplay Effect on World Sims

I have a question with the gameplay of the expansion pack. I am planning to buy it but I'm hesitating because I don't know what will happen to the NPC & World Sims.

Bit of info to share, In every save I edited all the sims from the world sims to the original households that come with the towns. Aging is also turned off and neighborhood stories as well because I don't want any sudden marriages, deaths and whatnot.

So my question is, if I buy the pack will it randomly start killing Sims that are in the played and unplayed households?

To the people who answer..

TIA :)