I agree completely. MOOCs require too much commitment to be frank. I'm currently finishing my EE degree, so I can't really afford to "follow along" given my already full course lod every semester. In addition, I'm more interested in slightly advanced topics covered in a rigorous manner.
MIT OCW is the best solution. The self-paced courses on Coursera and Udacity are OK, but the UI as you say is too clunky, and the content is a bit shallow.
Right now I'm starting to work through Computer Systems Security on OCW [1]. They provide lectures on Youtube, so no need to fiddle around with a third-party app on mobile. They also provide all lecture notes, exams, and labs for learning purposes. The content of the course itself looks extremely interesting as well, and covers a wide array of topics related mainly to RE.
[1]: http://ocw.mit.edu/courses/electrical-engineering-and-comput...