If its about to go to be destroyed, you can respond and pay to regenerate it rather than paying the commander tax after returning it to the command zone
Ogre Slumlord is an honorary rat and one of the best token producers in the deck
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All things considered, you'll want to take away either Dissolve or Hero's Downfall, since those are the answer cards that are allowing your opponent to line-up properly against your Ashiok
But the cheap cost and exiling effect make it pretty good
All this is to say, while people with big Reserved List collections will lose some value if the foil loophole is reinstated on the Gaea's Cradles and Gilded Drakes of the world, the impact is likely overblown, as the most expensive cards on the Reserved List are expensive because they are extremely rare and collectible, not because they haven't been reprinted
