Thanks for your comments, Chris.
I would only fuss over the numbers for a user consist, not worth it for AI
I feel the same way.
the consist icon in the editor will still pick up any QD consists
I didn't know that. The final release will have three sets of stacks. I'll include Preload blueprints for each of them.
I don't know how to pre-load the wagons in such a consist.
I assume by "pre-load" you mean set out the stacks with their containers "turned on." I don't think it can be done. In anything but a Quick Drive scenario you'll still have to select the car/consist in the scenario editor and "load" it with containers. Unfortunately, this doesn't work in a Quick Drive scenario because consists are not visible in scenario-edit mode -- only the consist gizmos. On a recent project with two large intermodal yards, I wanted to have both loaded and unloaded well cars in the Quick Drive scenarios. I found it necessary to make a special "loaded" version of a double-stack consist in which the containers are an integral part of the railcar geometry, not child objects as is normally the case.
is it possible to have a "half load"
With a little bit of effort, yes. I will include a modification kit in the final release consisting of the two container textures in TGA format, and the container geometry in 3DS format. Anyone who knows their way around a modeling program should be able to import the art files and create additional load configurations. Keep in mind that each well car is tied to a specific container configuration by virtue of the parent-child relationship specified in the car's blueprint. However, as we all know, blueprints can always be edited.