I agree. Between the sequels and the live action remakes I think Disney loaded up on a lot of unoriginal content all at the same time. Add to it the Marvel and SW sequels and spinoffs and you get a calendar crowded with derivative movies and no new content.
But I also think there is a good reason for this. My TV is pretty big. My couch is comfy. Netflix is cheap. Between, dinner, snacks, tickets, and a babysitter, it costs me well over $100 to take my wife to a movie for a night out. Obviously skipping dinner makes it cheaper, but you get the point. It costs me very little to sit on my comfortable couch with my Netflix and a nice steak I grilled and watch a movie.
I have no idea who goes and sees a romantic comedy at the movies anymore, but it isn't me. I do take my kids to animated movies, but only when it's raining. For example, this weekend we went and saw Despicable Me 3 at the second run movie theater. I can watch these things at home with my surround sound and my high def and my own popcorn and not miss a movie theater.
I can't say the same about Star Wars or Marvel. You want to blow something up? It looks cooler on a big screen. Sometimes I'll pay for it, sometimes I won't, but I won't pay for some silly romantic comedy just to see the actress' nostrils be 1 foot wide while she breathlessly waits for her first kiss. That works just fine on my home tv if my wife insists. I also don't want to pay for something I've never heard of and doesn't get great reviews. While other people may not like exactly what I like, it's pretty safe to say what everyone hates I won't like, and what everyone likes I might like. And if I might like it, I might pay for it, or I might just still wait until it hits Netflix.
So the production companies are realizing there is a market for certain movies in theaters, and there is a market for certain movies at home. How they adjust to this reality, and how they set budgets and pay for it, will be key going forward.
There is a smaller and smaller margin for error for theatrical releases. And a franchise, while maybe boring, gives you a head start on that margin.