Such powers already come with components (the relics and charms from TQ). If GD allows us to use dyes on all armour parts (in TQ you can only dye your tunic), then it should not affect stats, too - would only result in power creep. I think GD has sufficient cogs to boost your power.
On the other hand, there has been the request [thread=3148]Relics and Charms changing the gear visually[/thread]. This again would most likely result in an overkill in effects. It might work, if you limit such effects to weapons, shields and chest armour. But there are already plans to attach the medal to the chest armour.
I feel dyes should only have the expected visual effect and components only improve your powers.