I think Lifetime Analytics is an amazing tool to help monitor App usage, but it still lacks basic features.
One of them is the ability to monitor custom events.
It is useful to monitor slow actions, but it be nice to be able to track their usage in specific contexts, for example, a certain action can behave a good average response time, but there might be a specific scenario where, for example, a specific user role might have an abnormal above avg response time.
Through custom events or variables it would be possible to keep track of these scenarios.