Kibana is great for creating meaningful visualizations from log data, so why not use Kibana to visualize traces too?
Just a taste: Status code histogram
A status code histogram can help you recognize when many bad requests between services occurred.
To create these visualizations:
In Kibana, from the Visualization menu, select Create new visualization.
Select the Line visualization type. The X-axis represents the timestamp of the span and the Y-axis shows the number of occurrences of each status code for the account.