Overall, I like where you were headed with the arrangement (burnt ends framing the two sides of the slices), I like the color, the slices look moist and appealing. I would agree that the placement of the slices could use some improvement as #5, #6, and #7 are out of sync with the others. The glare from the lighting is deceiving on the right hand column of BE's, so I disregarded that. I think this is a strong 7, but in all honesty I believe in person it may score an 8.
You might consider leaving out the slices that are different widths, like the leading one for example.