This is a simple suggestion that will not only make accessories more noticeable to the wearer, but (possibly) make the price of silver keys more viable.
Accessories could give UI changes. This would in no way give players any advantage at all, but would still make a lot of players happy. And as we all know, happy customers=more people talking about the game= more players= More profit for OOO. Some changes would be:
Helm Mounted display: Turns the cursor into crosshairs, matching the colour of the accessory.
Vitakit: Turns the slot with Health capsules in it red and white.
Dragon Wings: Gives the arsenal/mission screen etc. A fire theme.
Knight-vision Goggles: Night vision (basically gives the screen a faint green tint ( Which would NOT be on in LD/BN to prevent colour confusion))
Note: All these features can be TURNED OFF in the options menu, there for if you like the accessory but not the UI change you can simply disable it.
Originality - As far as I know, nobody's ever suggested this.
Ease to implement - Remaking skins of 2D UIs wouldn't be that hard or time consuming for a professional.
Profitability - Raising the product's quality also raises its desirability.
Beauty - On the hands of Three Rings, this is guaranteed to be pleasing for people's eyes.
+1