Auto-Ship Round Up Conditions

What would you like to be added?

I like the ability to round up to full boxes when auto-shipping, but I'd only like to do so when the box is mostly full, say over half full. I don't want to round up a box with one round to 50, for example. I guess the feature request could be a fixed filled % minimum, like 50%, or a configurable minimum %.

Why is this needed?

I know an auto-ship round up purchase can be reviewed, but if parameters could be set around the round up, I wouldn't need to review at all.