One minor note: From my experience when studying, if a lecturer used a powerpoint I immediately knew the lecture would be less engaging compared to if they were

One minor note: From my experience when studying, if a lecturer used a powerpoint I immediately knew the lecture would be less engaging compared to if they were writing directly on a chalkboard/white. Powerpoints are just... Bad. But yeah I think the idea of preparing quality content (and potentially reusable content) and using the class time to instead get interactive feedback is the flipped classroom idea, which is popular.