That would require forward thinking and quick response and execution on MoCo's behalf - history tells me it ain't happen'n. Unlikely that the assembly folks know anything about this as it would require a change to the SOPs (Standard Operating Procedures) used in the assembly line (i.e. connect part A to Part B using screw C). To edit these sheets, would require a complete engineering review and hierarchical sign-off which would take as long as the fix itself (2 yrs? Remember this was a problem in the ’09 SERG) - not to mention a legal review. Maybe I'm too cynical…hope I’m wrong.
To us really cynical folks, you are just stating fact based on years of observation of the MoCo. I wouldn't call your statement cynical at all.
I don't believe you will ever see H-D add those parts in production. You might see them make a change to the molded plastic seat pan to "build in" bumpers, or you might see them eliminate that seat design after this model year and try again, with perhaps a more qualified person doing the design work this time. A one time tooling change to a plastic mold is a lot cheaper than adding parts and labor in the assembly plant.
Jerry