I realize the survey is down, but a course about the UE4 way of game code structure for new devs to the engine would be amazing. (namely C++)
There are currently several tutorials for piecemealing content, but that often leads to developers trying to stitch things together their own way and fighting the existing systems (from experience with a UE3 game that does exactly that). What I would suggest would be something to walk through creating a minimal, bare-bones game with all of the parts of a full game, pushing a strong focus on the organization and how’s of the engine. Overall client management, frontend UI, game class, pawn class, player controller, player input, how these things interact, the best (or intended) ways to utilize them for maximum effect, etc…