We have a view that identifies any orders with stock held in our offsite location. The view works fine in the new open orders screen but the new order details screen does not include stock levels. This means that with multiple line orders you can't see which line is out of stock (the old order details screen has this info)
At the moment we do already have a plan for some additional indicators on the View Order Details screen within the new Open Orders module. Currently our roadmap includes adding stock indicators in a 'In Stock'/'Out Of Stock' form. We have added your suggestion to our Feature Request list and we will make sure to consider it when making our final decision.