[mtrpcic]

I think that my issue with the chart (and it's such a minor issue to quibble about) is that you're effectively treating your single dataset (actual traffic over time) the same way you're treating your annotations (expected and worst-case traffic). Both of these different things are represented the exact same way in your chart, which is a confusing way to structure things. I would alter the appearance of the ceilings/bounds to not be represented in the legend, and instead be on-chart annotations that show where those expectations were relative to the actual traffic. I would also recommend adding even the most rudimentary labels to the axes.

[itcmcgrath]

No arguments there. There's a balance that needs to be struck between technical detail and marketing appeal. Not everyone is going to agree on where that balance is, less so when you're trying to share sensitive information without giving too much away.