Calculate USPS shipping based on the lowest cost instead of smallest box
Prevent USPS from using smaller, but heavier and therefore more expensive, box sizes when calculating shipping.
Nathan Ingram commented
I'd love to see this included. Give the user the ability to switch between lowest cost or smallest box.
Currently having an issue where the USPS module packs orders into a smaller box which is $5 more expensive on average to ship than the slightly larger flat rate regional priority box.