It would be nice if there was a file upload option for replacing a document on OneDrive. I've run into a perfect instance for this feature. I downloaded a document, made extensive changes to it, but need to replace the older version on OneDrive. Currently, I have to delete the shared document, upload, reassign sharing/permissions and write a message to alert users that I uploaded a new version. But if this feature was present, I could simply upload this new document and the previous would be replaced. I could not apply the extensive functionality using the "Online" version, the "Open in Excel" is super buggy only giving me Read-Only access when I'm the owner of the document, so the only option I had was to download.