Why do you feel the need to keep the first POV constant into the second story when the focus on character changes?One thing I considered was splitting the novel up into two stories, but in one volume. First the MC and the PoV is the same and his story plays out as normal. Then as his story ends the new MC enters and her story begins - but the PoV stays where it's been all the time. I've got a feeling this may not be such a good idea though. It kind of feels as if when the story ends the book should end - it shouldn't begin a new different story. Any thoughts on this?
That's the key, in my opinion. Like with Shawshank we talked about before, there's a good reason the POV isn't Andy. What's your reasoning?
Once we understand the why, we can give you better opinions.