I think we will see when CL rotates out of modern, more of these cards fall to their burn value. Without the changes you mention, the long term future of the game is at risk. Also purchased cards should have more utility and value over soulbound ones imo.
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RE: When it is Better to Burn a Card Instead of Selling it: a Case Study to Explain it! + Considerations about Active Draft Proposals (ENG/ITA)