Even as a male with large hands, the 11 is just a hair wider than my perfect comfort point (which, for me, is the slightly narrower 11 Pro). For a woman with typical hands, I could see where the 8 might be a more attractive size.
Truth is, we've reached the point where new models aren't necessarily all-around upgrades *for us.* While there's always at least one better feature, there may also be downsides. Do consider the features, though. You're right about the camera, but the 11 also has better battery life, FaceID, and a nearly full-screen experience. But you could partially mitigate the batter life advantage by buying a new batter for your 8, and the other things may not matter to you as much as the size you prefer. Trust your gut on your needs/wants and don't think about the 8 as a "downgrade."
Truth is, we've reached the point where new models aren't necessarily all-around upgrades *for us.* While there's always at least one better feature, there may also be downsides. Do consider the features, though. You're right about the camera, but the 11 also has better battery life, FaceID, and a nearly full-screen experience. But you could partially mitigate the batter life advantage by buying a new batter for your 8, and the other things may not matter to you as much as the size you prefer. Trust your gut on your needs/wants and don't think about the 8 as a "downgrade."