Minimizing wait times on pick up stops

Summary:

Looking for a way to minimize excessive wait times on the pick up stops of a shipment

Content (please ensure you mask any confidential information):

We are having shipments based on a multi stop scenario where we keep adding pick up and delivery orders to existing shipments using the 'move order to existing shipment' action.

Due to the delivery and pick up location calendars, we are observing a few stops where the wait times are getting excessively huge,; in some cases being up to a day or even longer.

The approaches tried so far that haven't fully worked yet are: