I know that everyone who needs to know this already knows this but it is worth reiterating. I've personally on-boarded half a dozen people to Steem and predominantly @threespeak and number one priority is a simple system to hide the complexity of keys. Whether this is followed by users being able to take ownership of their keys later (or leave them in the hands of a trusted log in system) or whatever the techs come up with, this is THE step needed to ever gain mass adoption.