Should be able to view all scheduled posts in a list view, and edit captions & hashtags from this list.
Interface could look something like the Schedule View on Google Calendar. Or look like a sheet in Airtable.
Would help to get around the wonky & unresponsive Month view, even the Week View is pretty unresponsive (ie. looks terrible when the browser window is narrow, and breaks some functionality)
The Preview view already kind of has this list formatting partially worked out, in what appears on the right hand side. Just need to be able to click into those posts and be able to edit from that List.