Is there anyway to get the site to offer Premium Economy (W?) seats on a BA flight?
If you search by Price & Schedule, there is a column that displays Premium Economy fares.
However, Premium Economy fares available on AA.com are often much higher on AA codeshares than BA-coded fares. For instance, you will often find BA-coded T or E fares on AA.com, but usually just W fares are offered for the AA codeshare.