The designs and logos for The Sims 4, and it's Expansions/Game Packs/Stuff Packs/Kits/DLC/etc., are all massive downgrades in general, compared to the previous Sims games. As an example, here's the game covers for the various Pet-related Expansion Packs in the series:
And here's another example, with the University-themed Expansion Pack covers:
Also, notice how the subtitle for each Expansion Pack. i.e. "Pets", had it's own unique font for TS1, TS2, and TS3, but EA chose to use just one font for their Expansions for TS4, presumably out of laziness, or being cheap.
Not to mention the original game cover for The Sims 4 base game was changed, and the original one was already lackluster to begin with, as shown below:
Original Cover:
And the Current Cover:
Notice how the first TS4 cover doesn't have children on it, and the new cover doesn't have elders on it either. Then again, given how TS4's devs pushed for the Young Adult/Adult life stage gameplay, while making the other stages severely lacking, i.e. Teens being the same height as Adults, them changing the game cover like that was inevitable.