Great point, well articulated.
Our product does not officially support Exchange (mostly due to dev bandwidth limitation :( ) BUT if you can subscribe to your Exchange calendar in a Google Calendar (linked to any Google Account) then you can try Hera without any frictions because Hera will be able to pull your meetings from the Exchange calendar.
I've seen resources for that: https://www.howtogeek.com/435975/how-to-show-an-outlook-cale....
Let me know or shoot me an e-mail at bruno at hera dot so if you need any help!