I love what you did. You are so resourceful! The last styling is quite dramatic, and I like it. How did it move? The belted look is more approachable and conventionally flattering. The last outfit looks like something that would look great at an art opening.
And fear not, you look amazing with waist definition RIGHT NOW, as you are! It actually surprises me that you would think this way. Although I understand the desire for a slim midsection, I chase that dream as well, harder and harder to achieve as the years add up.