On a recent event, my client did not name their banner ads as they uploaded them. After their event ended, they wanted to pull the metrics for their banner ads. However, because they weren't named, all the banner views equaled 147. I went back and added names to the banner ads, but it reset the count from the time I renamed them.
The client now has no way to see their banner ad metrics because their event has ended.
A good update would be the ability to rename banner ads and still keep the same metrics from before renaming.