They have found a formula that works and are sticking to it. With that said, I would say that Deadpool pretty much shoots your comment out of the water. It was very different from all other Marvel movies and dissimilar to their other movies in many ways.
I'm not sure what you want, though. Comic books, in general, are cookie cutter in that most of them stick to the same formula. Sure, there are more and more examples of comics that no longer stick to the classic formula (i.e. Walking Dead, Preacher, etc), but that is not the Marvel/DC M.O. So, doesn't it make sense that most Marvel pics would pretty much be "assembly line pictures"?
Deadpool didn't come from Marvel Studios. It was a Fox movie (which has its own well documented problems).
The Marvel Studio movies are very successful for many of the same reasons that people really like Disney movies. I'm not saying that's necessarily a bad thing, but ...
... what they did with Mandarin was a bad joke.
Captain America should have died at the end of Civil War. Everyone knows it.
And they are really crippled by their properties being split over three or four production companies.
I would really love it to see all of them under the same umbrella.
The Fantastic Four is one of my all time favorite groups. I liked the original 2 movies that Fox did. But they need to make a deal to move them over to Marvel Studios. That they are being left out of this universe (along with the X-Men) is a crime.
Thank goodness Sony made a deal to include Spiderman.
I want to see Wolverine or Thing fight the Hulk.
I want to see Prof X, Mr. Fantastic, Tony Stark, and Bruce Banner work together on a project.
I want to see a conflict between the Avengers and the X-Men.
I want to see Dr. Doom (one of the best villains ever) cause trouble for everyone in the Marvel universe.
I want to see more of the Silver Surfer.
This current disjointed mess is very frustrating for a long time comic book fan.
I would also like to see Marvel do a few more movies like Winter Soldier, that had a lot of gravity, and was more than just the introduction/joke/conflict/joke/resolution/joke/after credits spoiler formula that we see too often.
Those movies are fun, but too many of them over and over and over again becomes a too predictable.