Would it be too much to have major work taking place over 1.2 days with a large amount of flashbacks and also short anecdotes about the protagonist between the chapters?
Definitely can work
Are viva voces presented like a speech??? I have mine on Monday and I'm not too sure as to how I should go about presenting it.
I guess you could say they are like a speech, but they definitely aren't a speech. Think of it more as an open dialogue, a conversation. You have the ability to direct the viva voce to a certain extent. In my E2 viva, my teacher started with an opening question, and I responded by explaining how I've explored whatever she mentioned in my major work, and then I would make sure I was directing it in a way that I finished the response angling at a point she wanted to talk about. But for the most part, it was pretty much she asks, I respond, she asks, I respond.