I agree with Socks. It's not a bad idea just needs to cost something to prevent people from freely swapping to what they want when they want it. +1 if it includes some kind of money sink.

Maybe adding a timer for refunding?

+/-, I can see this being used to get benefits off a job, then switching to another job and just refunding and re-spec'ing into said job. 

Suggestion: Prestige Upgrade Refund/ Prestige Refund Button Link To Relevant Addons: N/A Media/Screenshots/Videos:   How will this improve the quality of Aether?: This suggestion would improve the quality of Aether by giving players more flexibility with their Prestige Upgrades. Players would be able to refund individual upgrades they no longer need or accidentally purchased, as well as completely reset all Prestige Upgrades to reclaim their Prestige Points and create a new build. These features would reduce frustration, encourage experimentation, and make the Prestige System more user-friendly by giving players greater control over how they spend their Prestige Points.

i was thinking of this too +1