There is a lot of things being said about the promo, and TBH most of the above is TLDR, but I skimmed some of it.
I have a history of buying the promos cheaper on the secondary markets. I have no interest in the promo cards at these prices, but only because the ROI on them is worse than buying a BTC mining ASIC.
With the game at the levels it is now, the cost is not worth it to me, but it is to many. Eventually, they find themselves selling cards and the price drops based on many factors like power creep or other new mechanics.
I will likely find it cheaper in the future and eventually own a copy. I might change my mind and buy one, but at this point, I do not find myself with FOMO.
I think that there needs to be a burning event and inflation of the burning titles a bit, I would like to see that there be some prizes that are not SPL related, such as HBD, HIVE. I would also like to see the top 3 users to get to design a card that would go in the voucher shop. The idea of the HIVE and HBD rewards is to provide a way to have incentive rewards that will not be also sold on the SPL markets for exit liquidity.
(Edit: The idea of the non-SPL assets is to give users a chance to decide to purchase more SPL assets or interact with the HIVE assets and ecosystem by staking or HBD Savings for interest or to provide a reward that does not require additional sell pressure, but more of potential buy pressure on SPL assets and trading HBD for credits to supply the Splinterlands company with operating assets.
The below promo card ideas are just things I randomly thought of and I am not saying it is fully designed, but a loose potential framework for the idea)
Each card would be a common (as to need more BCX) with the incendiary, weary, and immunity on all of them
Also lookout, reflection shield, return fire, magic reflect, retaliate, void armor, dodge, camo, shield, and phasing (each card gets ~2-3 of these over levels)
Also heal, tank heal, repair, protect, corrupted healing, swiftness, blind, and cleanse (1-3 of these over levels).
Price the BCX as a legendary or epic level pricing, but it has 10 levels since it is a common.
During the event, any CP that is burned will also produce 10-25% of the CP in Glint. Energy will be priced at a 25-50% discount time crystals and any other items that accept DEC-B would be at a discount for DEC purchases. DEC-B would be purchasable at the same rate as the above discounts, but buying things with DEC-B would not offer the discounts. If you want to get even fancier, burning SPS for DEC could provide some glint, but ideally DEC gets to peg, so that burning makes sense.
CL cards might have some bonus glint or bonus leaderboard points, as to target the supply of these cards.
Pair all this with the unlocking of the new SB cards based on the recent proposal and change the SB unlocking that is already in place to stay at the introductory rate over the duration of the unlock, since the unlocking of them is already low at this price.
The introduction of the new support cards above will be implemented directly after the end of the event and will encourage the burning of a massive number of vouchers. I would suggest also that these three cards be named as fiends with some low mana cost and the ability to activate the new card in the promo sale.
@Nate @Yabapmatt @ROYALEAGLE @Vugtis 
I hope that the above is a good idea, but I am not sure I will be around too much to discuss and debate the random specifics I outlined, as I am shooting from the hip and have a ton of other stuff on my plate.
^^ rewards to be paid by the DAO, I would think.