I'm a relatively new simmer who just started playing The Sims 4 within the last two years, and didn't play older versions.
For a Livestream (or even a series of video tutorials) I would personally get a lot of benefit out of an in-depth discussion of how to manage the graphics settings for The Sims 4, directly from the people who built the game.
When I watch YouTube videos of even smaller simmers playing The Sims 4, their graphics look amazing. No matter which settings I try to change in my game, I can't achieve that look. I don't know what each individual setting does or how they affect each other. I am not satisfied with my current level of graphics v performance and I am sure it's because this is not clear to me.
Lots of other people in this thread are sharing their wish list for improvements to The Sims 4. I have my own wish list but will save it for when you specifically ask for that.
EA Staff (Retired)