i missed this one when you first posted rob - but yes, i totally agree: the wall end is a sub-component of the wall and should be treated as such.
perhaps 'decorative' wrappings could remain GDL based wall accessories, but plain ol' wall endings belong as a function of the wall itself.
~/archiben
b e n f r o s t
b f [a t ] p l a n b a r c h i t e c t u r e [d o t] n z
archicad | sketchup! | coffeecup