Currently in OMSCS, after very recently taking some bachelor's level courses. The OMSCS classes are significantly tougher, go far deeper into the material, require more research and involve less hand-holding than the bachelor's level classes.

I interacted a bit with OMS CS students that were taking Udacity courses (there is some link between Udacity personnel/classes and OMS CS), and they all reported being flooded with difficult homeworks/projects, often racing against the clock to submit things before deadline. Some classes even take >40h/week according to them. It doesn't seem to be anything trivial as you'd have implied; more like a proper MS from a Top-10 school. Imagine you need to get a lunar lander module landing on the moon in OpenAI gym via Deep Reinforcement Learning, write your own real-time Augmented Reality system as your final project in Computer Vision, beat real-world radiologists using the very latest Deep Learning research from Stanford as a final project in health informatics, write your own Swift-like compiler etc. Does that seem trivial? If anything, it's awesome people can learn those things online with the proper academic rigor and without dumbed-down curriculum.