Make SharePoint accessible on the new version or the new version is a BIG SUCKBURGER!
Listen to the MANY MANY MANY people who use SharePoint and access it through the old version.
Tracy Altman commented
Specifically, whenever I tried to open a OneDrive or SharePoint file, I was re-directed to some other application entirely--sometimes back to Outlook Inbox, sometimes to an apparently randomly selected SharePoint site/page....there was no rhyme or reason to it.
My "idea," then, is to make "the new Outlook" actually function with the rest of Office 365, preferably before releasing it for general use.