I think it looks like too much pot, because the plants are not grown out enough to fill the pots up as focal points.
You can also try a gazing ball, large decorative rocks, drift wood, a small fountain, bird bath, ect, to help fill it out and add interest. You can also lay a pot on it's side, or even use a larger planter, like a water tank.
A small piece of decorative fencing or trellis behind a large planter would also look nice.
