Message Trace Support Using Graph API is now in Public Preview

I like the further integration of data in to graph.microsoft.com. And i know it is early and things are still unter development. If this should replace the old Reporting WebService so soon, then you should definitely enhance the documentation at https://learn.microsoft.com/en-us/graph/api/resources/exchangemessagetrace to answer common questions like:
- Add some samples how to filter the tracking data based on Recipient, Subject, Start/End-time. We know about opath-filters but it would make it easiert
- Will there be a concept with Sessionstate, USN  or similar?  We have customers, who grab the data from messagetracking regulary and store and parse them local. Maybe Change tracking Use delta query to track changes in Microsoft Graph data - Microsoft Graph | Microsoft Learn  (i have just seen the discontinued message on Microsoft Exchange Online Message Trace | Elastic integrations)
- Will there be a subscription or WebHook option, so exchange will post every TraceID to a self hostet Webservice, so we can collect all data (similar to the Teams Call Data records Receive change notifications through webhooks - Microsoft Graph | Microsoft Learn