Those are all the tentpole things, but we also have things coming to the service like the Love, Simon spinoff show, Ink & Paint, Cinema Relics, a new Phineas & Ferb movie, the Star Wars: Jedi Temple Challenge game show, and the Timmy Failure movie which comes out next week got a lot of positive buzz at Sundance, many reviews saying it's the best original content from Disney+ yet (yes, including The Mandalorian). This is all coming this year.
There's currently all the Star Wars and Marvel shows, but Willow, Turner & Hooch, True Lies, The Sandlot, and The Mighty Ducks all have series' in development. So Disney is definitely trying to use the Fox content. Especially on the film side where Night at the Museum, Home Alone, Cheaper By The Dozen, Diary of a Wimpy Kid and SpaceCamp are all being rebooted by 20th Century Studios for Disney+.
These first few years the growing pains are definitely going to be visible, but once the service really starts to hit it's stride in 2021-ish with constant new content, it should be in a better place. I do think they rushed getting D+ going, but they're able to get away with it because they're Disney. The theatrical movies being added is still a huge plus on my end as I didn't see either Aladdin or LK in theaters but have now been able to see both just because of my D+ subscription. I never got around to seeing Frozen 2 in theaters either because I heard mixed things (same reason I didn't see the other movies), but i'll gladly watch on streaming.