Well the trade rules have always been bust - more info in the UWP could only help both of those issues.
For instance, why when you're buying goods from an ag world you roll up computers and goods from an industrial world become furs & skins. Type of cargo needs to be tied into type of world.
Similarly with animals, the kind of biosphere will dictate the kind of creatures permitted; the more bio-diverse the better chance for the higher animals, etc etc.
Regarding info design, if we break the UWPs into 3 digit chunks, it solves alot of the problems with the 6 digit string.
With 3 numbers it is easy to differentiate between them, one is obviously on the right, in the middle, etc. With 6 numbers, the third and fourth in particular are vulnerable to getting mixed up. This sis something that may have contributed in the past to errors in supplements, as the writers/editors/proofreaders get them confused. It is easy to do, and almost impossible to spot when it's happened.
That would then correspond with any further additional factors, such as PGP, or Climate/Resources/Biosphere etc.
So a standard UWP would look like this:
A 765 748 8