The burn part is interesting, but not for RW, since:

• it devalues future sets, in at least 2 ways:
  • the more cheap cards you got the less need to buy cards at normal prices, just look at the impact of Arkemis sale on RW sales, or the impact of the the huge diversity in soulbounds overall in CL/RW and so on;
  • perpetuates the expectation of huge discounts, since it will provide a huge discount for an ongoing sale (we all saw how much value Arkemis promo killed in CL), making ppl wait for them instead of buying at normal price (thus hurting company revenue which we all need healthy);
• 'Let's wait and see what land does first' - if ppl really want RW, buy it at the newly discounted price in DEC. We shouldn't make discounts on top of ongoing sales as stated above;
• 'There aren't enough cards for land/we have a card shortage' - well from what I heard, most don't even expect 20% of it to be used, so agree with you here that a burn should be desirable (but ofc not for RW);
  cards that should not be burnable for DEC are soulbounds/gladius;
• 'It will devalue RiftWatchers cards and be a slap in the face to those who bought in early'- those have already been hit with the bad RW for DEC approval, there isn't even attempt to refute it, those would take a double hit having RW 'selling' at the lowpoint of $1.1 at current market prices or less if you consider reward cards prices before soulbounds;
• 'Some DEC will not go to the DAO' - least of our worries;
• 'This is a discount on RiftWatchers and discounts devalue cards' - it would increase the floor of certain rarities for existing sets, but likely will decrease the non floor cards;
• 'What about the DEC created from burning cards?' - lets not overcomplicate things, only

As an altenative, the following avenues could be interesting to explore (I'm sure there might be others):

• burning cards of the same rarity in a 2:1 (or more, and possibly add Vouchers to it with different amounts per tier of rarity) ratio for minting soulbounds;
• burning cards for an upcoming promo card;
• burning cards for an upcoming set (never an ongoing sale);
• burning cards for skins or other cosmetics.
  These would all be a lot better alternatives to burning cards for RW.