I was hoping that Flow would bring a level of ease of use, quick and easy configuration, simple actions.
Sadly it feels too much like SharePoint Designer in HTML.
The UX is frustrating, editing a body of an email the cursor won't move, no information about the document creator in File Create events, no ability to link to the Office Online view of a document without trying to do KungFu text manipulation.
Any request to the forums for help on doing something results in a link to Workflow Definition Language https://msdn.microsoft.com/library/azure/mt643789.aspx
I get it's a power user tool, but you have to make the 80% of use cases just work for the average user.
Good effort, a long way to go. Please focus you efforts on get the 1st use to be slick and simple. I'm a serious power user, coder, SharePoint oldie and after a day of hacking basically at the point of saying no thanks, will look else where.
You gotta get the adoption right, the 1st use, the quick win - without this your in the same space SharePoint lives - an overly complex application that I have better things to do than learn... Hey Box thats simple...