In my opinion, the game lack a lot of unpredictability and you know what's a remedy for that? Weather. It at least gives the feeling of something random happening even if it's a small and insignificant thing. This pack is an essential for me and I am similar to you in terms of what I think of this game. But you don't get to adjust the weather!
Btw. For DLC in general, personally I think Stuff packs are barely worth it. Maybe one or two and that's it. Game packs I like are Dine Out though it is very very buggy and parenthood though in my opinion it feels a bit too empty.
For expansion packs the only ones I would buy are the ones you are absolutely interested in. One that you like all the features and the execution so make sure you watch tons of reviews to know what's in the pack (cause EA descriptions tend to paint a false picture).
My second choice would be Get Famous if you're interested in that kind of gameplay because it is kind of well made and Get Together. All the others are not well executed nor very full imo so you'll have to really like the features to buy them.
If you are unsure if buying packs will make your opinion of the game better then set a certain amount of packs as a limit. For example buy three expansion packs and think, am I enjoying this right now or am I just craving more content because the game still feels empty? If the latter ends up being true then I say be aware not to fall into the trap of buying packs that you will end up never using cause you are bored of the game (which is a trap I fell into unfortunately).
