I would keep it simple. On the top picture, I would move the bottom two hearts to the next right open white squares. This completes the empty holes in the middle and far right up/down columns. Gives it symmetry. So you have a far left column with hearts, two middle columns of hearts and the far right column with hearts, leaving 4 empty white columns. With, without, without, with, with, without, without, with. Hope that makes sense.