Sholder pads are already on most armour, so not needed.
(A short version of the cloud style arm capes I wouldn't actually mind Archadius )

Capes Oh Hell No!
They just woudnt suite the look fo the game imo and think of all the clipping issues with weapons and extra strain on Gpu's.
Only possible way id be happy is if it was part of a specific jobs gear and that would have to be a job with Vincent style ability's so probably not..

Tabards or Knights tunics i support to a point as long as they keep the more realistic look of the game..