The current version of Salesforce Usage Metrics for ISV apps as describe here https://www.salesforce.com/video/192805/ is quite limited and seems to suffer from a lot issues.
Is this a dead tool that will not be improved by Salesforce anymore? Or is there a roadmap to improve the tooling (current Appexchange app) and feature set (track more app metrics like Lightning and code usage)?
MetricsDataFile
object? I've had to write a few snippets of code that I've run in the Developer Console to get at some of our statistics because the UI stopped working for us. Some documentation can be found here.