Currently we can only hide Products/ Items and categories from the kiosk. It would be nice to expand on this to include modifiers/ modifier groups. 

I was thinking that maybe in the future we could a have a slide bar right here that could present the products/item that are on the POS as opposed to Kiosk. Then the same can be done with other categories so that we can maintain better control of the kiosk and keep it from getting to confusing for the customer.

The "Hide in Online Order" toggle hides items in both Zenpepper and QR Order, which makes the Virtual Kiosk fairly limited in what it can do. We have a "Hide in Kiosk" Toggle, but that's for the physical (and at the time of writing this, unsupported) kiosks, not QR order/virtual kiosk. 

Extra payments such as service charge are not included in KIOSK orders.(This was something that was specifically requested during the development of KIOSK).

For one of my Franchise groups we use the bar tab order type as the drive thru order type.  I have had requests on integration with a drive thru order display like you would see at McDonalds or Burger King.