Justin (et. al.)
QB is using a library for the calendars and some requests just aren't possible, or easily accomplished with the cookie cutter libraries.
They are using DhtmlX's calendar library, and you can see the documentation and possible features here:
https://dhtmlx.com/docs/products/dhtmlxCalendar/Although some features my have been lost in this release, by using this library they will be able to use more features in coming releases.
https://dhtmlx.com/docs/products/dhtmlxScheduler/I don't know for sure, but I'd be willing to guess that these other features on on the product roadmap for QB