Since already Unity RPG series have finish with the last course, it would be great if you did a UE4 course with C ++ to make a Souls Like type or an RPG 
I was just about to suggest the same idea! Learning how to create RPG/souls style game is exactly what im looking for.
More so I would love to learn how to design Souls style boss fights as well as an in deep learning of complex combat. As my first solo game ive been wanting to create a game where its just a souls like boss fight and the combat revolves around different weapons that can combo off of each other and I think a course like the one you suggested would be a perfect fit