I think it is very well done....I create abstracts and often I create an outline, if you will....in my case it is a 'puzzle' in carbon black ink and then I 'solve the puzzle' with color and extra lines/change of geometric shapes .....one thing I know is that I want to keep the viewer's eyes moving as they look at my work...it draws them in.....so anything you can add as a line or slightly brighter or contrasting streak of color or an object that doesn't distract them from the essence of the painting can have that effect