I don't think WorldShip will be able to print labels accurate enough for an individual package car for some time now.
Right now, WorldShip validates addresses at the city/state/zip level. That's enough to get it to an individual center. In rural areas where certain zip codes only have one driver, that's good enough to get it to a package car, but in cities of any size? forget it.
It IS possible to validate all the way down to a street address, which would be required for matching to a sequence number. Internet Shipping, iShip, and Campusship do this. WorldShip doesn't. my guess is that it either has to do with licensing or space issues.
In the past few years (roughly about the time PAS started coming out) WorldShip allowed address validation at the street level, but it's been a batch rather than a real-time process. WorldShip could automatically check the UPS version of the zipcode database and add the zip+4 on addresses it understood. The user could also manually ask to validate an individual address or addressbook. WorldShip, would bundle up the addresses and send them their system mailbox on the back end and UPS would compare with the database and provide alternate options. But that's only on the address book and only when the user initiates the check. It does not and will not check at time of shipping. WorldShip 9 does add and advertise being able to validate residential/commercial at the time of shipping. There's a button on the shipping tab which will validate that address at time of shipping (I'm sure this also helps get more correctly formatted addresses on the label the first time)
I don't think WorldShip will ever completely enforce valid street-level addresses on our shippers. My reasoning has to do with the inconvenience of trying to process invalid addresses and having to correct. This is most painful for our shippers who print their labels using batch process (this is nice, they have an import of data set up, run it on their orders for the day, and it automatically prints out all the labels) WorldShip already kicks out address that don't meed ZIP level validation and shippers have to manually go back and fix that shipment. that's a small percentage on batch. Think what it would be like if WorldShip is validating street-level info on 100 shipper-supplied address on a batch process. I'd bet most shipments in the batch would have to be manually processed. Customers would be screaming at the Help Desk to turn it off.
But let's say WorldShip is able to validate addresses down to the sequence number. Then every time the drivers convince the centers, convince local IE that sequences need to be updated (new housing developments, etc) those changes would have to be coordinated and scheduled at a corporate level so that WorldShip got the updated sequence information.
Now we come up against two major features of PAS that were selling points. It tells the preloader exactly where on the shelf that package goes based on what is expected for that car. This needs depends on how many packages prior in the sequence will also be loaded on that car. There's no way at time of shipping WorldShip could ever know that detail.
the other major selling point of PAS is the DMS portion. The dispatch supervisor can that morning before packages arrive, adjust the loads in the cars and if one car is heavy while another car is light, move volume to balance things out. Again, this depends on what's going to be in the center that day for delivery. WorldShip could never know this.
I think what WorldShip is doing which newer version of PAS hopefully take advantage of is box dimensions. I think it's be nice on the preload and the drivers, if PAS recognized when boxes were too large/heavy for the shelf and loaded that stop in a better location. The other requirement would be for EDD to tell the driver not just how many packages at his next stop, but where they are in the car.