* I wish there were a way to fund online education through philanthropy/donations. Coursera being for-profit leaves a bit of a bad taste in the mouth. At a practical level, it complicates what images I can use in my lectures and qualify as fair use.
* After several years the site is far from being at a point where an instructor can log on and upload content. The interface is constantly changing, confusing, and buggy. My university has a dedicated team who help out instructors with putting their material online and even they are often confused about how to edit this or upload that.
Overall I'm glad that Coursera exists and is finding a revenue stream; my own undergraduate education would have been vastly different if I'd had access to the material that's available today.
[1] Bitcoin and Cryptocurrency technologies https://www.coursera.org/course/bitcointech