So if you've read these or previous patch notes, blizzard does a nice little thing where if they nerf a card sufficiently they will increase the disenchant value to the full value of the card. This only lasts for a short time following a patch. If you have these cards, even if you suspect you'll still keep them, you should make sure you disenchant them especially if you have a golden variant. This way you can craft a more powerful card you're missing and worse case scenario you can always re-craft that card at no loss.
The cards that grant full disenchant value this week are: Flame Imp (40 dust), Unleash the Hounds (40 dust), & the Argent Commander (100 dust). (Golden Variants grant 400 ,400, & 800 dust respectively)
I was lucky enough to have 6 of these cards including 1 golden so I'm now a few hundred dust away from crafting the always annoying Legendary - Sylvannas Windrunner. I used the flame imps and the Argent Commanders in my warlock deck so I will wait a week or so to see what the verdict is on them after the changes and re-crfaft them if they're still worthwhile.